Give me radiological features of sinonasal tumors and other benign sin

Give me radiological features of sinonasal tumors and other benign sinonasal growth as I have to present lecture on it so please make schematic approach

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sinonasal tumors radiology CT MRI features imaging

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sinonasal tumors radiology CT MRI features schematic approach lecture review 2023 2024

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https://www.frontiersin.org/journals/radiology/articles/10.3…

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https://www.frontiersin.org/journals/radiology/articles/10.3…

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sinonasal tumor CT MRI imaging radiology

This schematic is structured for a lecture format across 8 logical sections. Here's a quick orientation:

How to use this for your lecture:

Part 1–2 → Opening framework: why CT first, MRI second, and the bone pattern discriminator — sets the diagnostic mindset
Part 3 → Benign lesions (9 entities) with memorable hallmarks
Part 4 → Malignant tumors (9 entities) with CT/MRI signatures
Part 5 → Rapid-fire comparison table (excellent as a slide summary)
Part 6 → The decision tree schematic — ideal as a single summary slide
Part 7–8 → Advanced imaging roles + pitfalls (good for discussion/MCQ)

High-yield mnemonics to highlight:

Cerebriform pattern on MRI → Inverted Papilloma
T1 bright / T2 dark → Melanoma (paramagnetic melanin)
T2 dark + dense CT + homogeneous CE → Lymphoma
PNTS along V2 → Adenoid Cystic Carcinoma
Peripheral intracranial cysts → Esthesioneuroblastoma
Flow voids + adolescent male → JNA
Ground-glass CT → Fibrous Dysplasia
Arc-and-ring calcifications → Chondrosarcoma

Create a PowerPoint presentation with schematic diagrams and imaging examples for your lecture

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inverted papilloma cerebriform pattern MRI nasal cavity

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esthesioneuroblastoma olfactory neuroblastoma MRI intracranial cysts

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juvenile nasopharyngeal angiofibroma CT MRI flow voids

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sinonasal squamous cell carcinoma maxillary sinus bone destruction CT

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ls /home/daytona/workspace/ 2>/dev/null || echo "workspace empty or doesn't exis…

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sinonasal melanoma T1 hyperintense T2 hypointense MRI nasal cavity

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sinonasal lymphoma nasal cavity CT hyperdense T2 hypointense MRI

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nasal polyp mucocele frontal sinus CT expansion

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adenoid cystic carcinoma sinonasal perineural spread MRI

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mkdir -p /home/daytona/workspace/sinonasal-pptx && ls /home/daytona/workspace/si…

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~/sinonasal-pptx/build.js

const pptxgen = require("pptxgenjs");
const { execSync } = require("child_process");

// ─── Fetch images ────────────────────────────────────────────────────────────
const imageUrls = [
  // [0] Inverted papilloma cerebriform
  "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_ded7169a4885c5d69adf8f03e62868a2d88a397a0b6e1ee09dac0eb8a8d57487.jpg",
  // [1] Inverted papilloma CT + MRI
  "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_bde8eaf3031d0d80eeefbbd5dd53f73861d952978d4bc3487e754fc9fd2d02eb.jpg",
  // [2] Esthesioneuroblastoma dumbbell cysts
  "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_1b87b71d39e0947ca73a89d0d9727a4142571e24adf81b9fedb7621ce63b4fa8.jpg",
  // [3] JNA MRI flow voids + CT vidian canal
  "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_cd50b17ede7b0f003a6310c59c9c4099cca6ac4dfe0b5b6c48a4e9848a2bf087.jpg",
  // [4] SCC maxillary bone destruction CT
  "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_dfb37d17393643e7d5f537160478e595274dc3c6289968f86daec5f1729d1e87.jpg",
  // [5] SCC perineural spread CT+MRI
  "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_9fc7da93295344f1205fc722b106e9ca83801d2279f3a264f1d4f5e5622e02b6.jpg",
  // [6] Adenoid cystic carcinoma perineural spread
  "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_037cfc460b5de82999c553761b0048771c6200e83407aedde531634fa38469e4.jpg",
  // [7] SNUC multimodal CT MRI PET
  "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_235565862e4529fc77b943f06415b46246496d0e336cb7424435b70c3028634a.jpg",
  // [8] Melanoma T1 bright T2 variable MRI
  "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_a56303c2640f1f7d0cc9bb94169c3dcd4c261203e0fce3131cf86cb5f651e868.jpg",
  // [9] Lymphoma T2 hypointense homogeneous CE
  "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_361a5848643447cd3966ad3b3d0cedeb94494b24ff5828e74fcfad40b8f607da.jpg",
  // [10] Mucocele frontal sinus CT
  "https://cdn.orris.care/cdss_images/pmc_clinical_VQA_69a1f783bdd2819cb3e569adf32df5d50a1176d6ba638f4fca8b904cf6983da8.jpg",
  // [11] ENB Kadish C sagittal T1
  "https://cdn.orris.care/cdss_images/roco_radiology_ROCO_39467_1766648326045.png",
];

console.log("Fetching images...");
const fetched = JSON.parse(
  execSync(
    `node /home/daytona/skills/shared/scripts/fetch_images.js ${imageUrls.map(u => `"${u}"`).join(" ")}`
  ).toString()
);
console.log(`Fetched ${fetched.filter(f => !f.error).length}/${fetched.length} images`);

// ─── Palette ─────────────────────────────────────────────────────────────────
const C = {
  dark:    "0B1E3D",  // deep navy
  mid:     "1A3A6B",  // mid navy
  accent:  "E84B3C",  // medical red
  gold:    "F5A623",  // highlight gold
  teal:    "00A8A8",  // teal
  white:   "FFFFFF",
  offwhite:"F0F4F8",
  text:    "1A1A2E",
  light:   "8FAEC7",  // light steel blue
  green:   "2ECC71",
  orange:  "E67E22",
};

function img(idx) {
  return fetched[idx] && !fetched[idx].error ? fetched[idx].base64 : null;
}

// ─── Presentation ────────────────────────────────────────────────────────────
const pres = new pptxgen();
pres.layout = "LAYOUT_16x9";
pres.author = "Radiology Lecture";
pres.title = "Radiological Features of Sinonasal Tumors";

// ══════════════════════════════════════════════════════════════
// SLIDE 1 — TITLE
// ══════════════════════════════════════════════════════════════
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  s.addText("SINONASAL TUMORS", {
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// ══════════════════════════════════════════════════════════════
// SLIDE 2 — AGENDA / TABLE OF CONTENTS
// ══════════════════════════════════════════════════════════════
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    ["01", "Imaging Strategy: CT vs MRI", "When & why to use each modality"],
    ["02", "Bone Involvement Patterns", "The key diagnostic discriminator"],
    ["03", "Benign Sinonasal Growths", "Polyps · IP · Osteoma · JNA · Mucocele · Schwannoma"],
    ["04", "Malignant Epithelial Tumors", "SCC · Adenocarcinoma · AdCC · SNUC"],
    ["05", "Malignant Non-Epithelial Tumors", "ENB · Melanoma · Lymphoma · Rhabdomyosarcoma"],
    ["06", "Schematic Decision Tree", "Algorithm for radiological diagnosis"],
    ["07", "Quick Reference Table", "Hallmark signs at a glance"],
    ["08", "Pitfalls & Advanced Imaging", "DWI, PET-CT, perineural spread"],
  ];

  items.forEach(([num, title, sub], i) => {
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    const row = i % 4;
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    const y = 1.1 + row * 1.05;

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}

// ══════════════════════════════════════════════════════════════
// SLIDE 3 — IMAGING STRATEGY
// ══════════════════════════════════════════════════════════════
{
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  s.addText("IMAGING STRATEGY: CT vs MRI", {
    x:0.6, y:0.12, w:9, h:0.5,
    fontSize:20, bold:true, color:C.white, fontFace:"Calibri"
  });

  // CT box
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  });

  const ctPoints = [
    "Define site of origin",
    "Bony remodeling vs. destruction",
    "Intralesional calcifications / tumor matrix",
    "Identify feeding arteries",
    "Detect cervical lymphadenopathy",
    "Screen — mimics sinusitis initially",
  ];
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    x:0.75, y:1.58, w:3.95, h:3.1,
    fontFace:"Calibri", valign:"top"
  });

  // MRI box
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:5.15, y:0.95, w:4.3, h:3.95,
    fill:{color:C.mid}, line:{color:C.gold, pt:2},
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  s.addText("MRI  —  PROBLEM SOLVING", {
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    fontSize:14, bold:true, color:C.dark, fontFace:"Calibri",
    align:"center", valign:"middle", margin:0
  });

  const mriPoints = [
    "Superior soft-tissue differentiation",
    "Tumor extent mapping",
    "Tumor vs. obstructed secretions",
    "Perineural tumor spread (PNTS)",
    "Intracranial / orbital extension",
    "DWI/ADC: ↑ benign/mucus  |  ↓ malignant",
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}

// ══════════════════════════════════════════════════════════════
// SLIDE 4 — BONE PATTERNS
// ══════════════════════════════════════════════════════════════
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    { label:"BONE\nDESTRUCTION", color:C.accent, sub:"Aggressive erosion of cortex", assoc:"SCC · SNUC · Melanoma\nOsteomyelitis · Invasive Fungal Sinusitis", icon:"💀" },
    { label:"BONE\nREMODELING", color:C.teal, sub:"Smooth expansion / dehiscence", assoc:"Mucocele · Polyp\nInverted Papilloma · Schwannoma\nCephalocele", icon:"🔄" },
    { label:"REACTIVE\nSCLEROSIS", color:C.gold, sub:"New bone / ivory density", assoc:"Chronic infection\nOsteoma · Fibrous Dysplasia", icon:"🦴" },
    { label:"FOCAL\nHYPEROSTOSIS", color:"6C3BAA", sub:"At tumor attachment site", assoc:"★ INVERTED PAPILLOMA\n(pathognomonic)", icon:"📍" },
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// ══════════════════════════════════════════════════════════════
// SLIDE 5 — BENIGN: POLYPS & INVERTED PAPILLOMA
// ══════════════════════════════════════════════════════════════
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    ["CT", "• Bilateral, multiple, low-attenuation\n• Expand sinus → remodel bone (not destroy)\n• Mucosal thickening background"],
    ["MRI", "• T1: Low signal\n• T2: Hyperintense (high water content)\n• Enhancement: Peripheral rim ONLY (not solid)"],
    ["KEY RULE", "BILATERAL = think benign polyposis\nUNILATERAL = must exclude neoplasm!"],
  ];
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  });

  s.addShape(pres.shapes.RECTANGLE, { x:0.6, y:3.2, w:4.25, h:0.03, fill:{color:C.teal,transparency:50}, line:{color:C.teal,transparency:50} });

  s.addText("ANTROCHOANAL POLYP", {
    x:0.6, y:3.3, w:3.8, h:0.3,
    fontSize:10, bold:true, color:C.gold, fontFace:"Calibri"
  });
  s.addText('• Unilateral "dumbbell" through posterior choana\n• Arises in maxillary sinus → exits via accessory ostium\n• T2 hyperintense · Peripheral enhancement (vs. solid in IP)\n• Young patients; NO bone destruction', {
    x:0.6, y:3.64, w:4.3, h:1.0,
    fontSize:9.5, color:C.white, fontFace:"Calibri"
  });

  // Right column — Inverted Papilloma
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:5.1, y:0.85, w:4.75, h:4.62,
    fill:{color:C.mid}, line:{color:C.gold, pt:1.5},
    rectRadius:0.1
  });
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:5.1, y:0.85, w:4.75, h:0.44,
    fill:{color:C.gold}, line:{color:C.gold}, rectRadius:0.1
  });
  s.addShape(pres.shapes.RECTANGLE, {
    x:5.1, y:1.0, w:4.75, h:0.29,
    fill:{color:C.gold}, line:{color:C.gold}
  });
  s.addText("INVERTED PAPILLOMA  ★", {
    x:5.15, y:0.87, w:4.6, h:0.4,
    fontSize:12, bold:true, color:C.dark, fontFace:"Calibri",
    align:"center", valign:"middle", margin:0
  });

  const ipData = [
    ["SITE", "Lateral nasal wall → middle turbinate\n→ ethmoid/maxillary sinuses"],
    ["CT", "• Soft-tissue mass, bony REMODELING\n• FOCAL HYPEROSTOSIS at base ★\n• ± Intralesional calcifications"],
    ["MRI", "• T1: Iso- to hypointense\n• T2: Hyperintense to muscle\n• ★ CONVOLUTED CEREBRIFORM\n  PATTERN (CCP) — 80% of cases"],
    ["RISK", "10% malignant → SCC\nLoss of CCP + bone destruction\n= malignant transformation"],
  ];
  let ipy = 1.42;
  ipData.forEach(([lbl,txt]) => {
    const lc = lbl==="RISK" ? C.accent : C.gold;
    s.addShape(pres.shapes.RECTANGLE, { x:5.2, y:ipy, w:0.8, h:0.28, fill:{color:lc}, line:{color:lc} });
    s.addText(lbl, { x:5.2, y:ipy, w:0.8, h:0.28, fontSize:8, bold:true, color:C.dark, align:"center", valign:"middle", fontFace:"Calibri", margin:0 });
    const lines = txt.split("\n").length;
    const h = Math.max(0.54, lines * 0.26);
    s.addText(txt, { x:6.08, y:ipy, w:3.65, h:h, fontSize:9.5, color:C.white, fontFace:"Calibri", valign:"top" });
    ipy += Math.max(0.7, h + 0.15);
  });

  // Image - Inverted Papilloma
  if (img(0)) {
    s.addImage({ data:img(0), x:5.2, y:4.05, w:4.5, h:1.35, altText:"Inverted Papilloma cerebriform MRI" });
    s.addText("▲ Inverted Papilloma: Cerebriform pattern on CE-T1 MRI", {
      x:5.2, y:5.38, w:4.5, h:0.18,
      fontSize:6.5, italic:true, color:C.light, fontFace:"Calibri"
    });
  }
}

// ══════════════════════════════════════════════════════════════
// SLIDE 6 — BENIGN: OSTEOMA, FIBROUS DYSPLASIA, MUCOCELE, SCHWANNOMA
// ══════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:5.625, fill:{color:"F7F9FC"}, line:{color:"F7F9FC"} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:0.72, fill:{color:C.dark}, line:{color:C.dark} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:0.35, h:5.625, fill:{color:C.teal}, line:{color:C.teal} });

  s.addText("BENIGN SINONASAL GROWTHS — Osseous, Mucocele & Neural", {
    x:0.6, y:0.12, w:9, h:0.48,
    fontSize:18, bold:true, color:C.white, fontFace:"Calibri"
  });

  const lesions = [
    {
      name:"OSTEOMA",
      color:"3A9BD5",
      site:"Frontal sinus (most common)",
      ct:"Dense cortical (ivory) OR ground-glass\nWell-defined, homogeneous",
      mri:"T1/T2: Low signal (cortical bone)\nMild post-contrast enhancement",
      key:"Most common benign sinonasal tumor\nMay obstruct drainage; usually incidental",
    },
    {
      name:"FIBROUS DYSPLASIA",
      color:"9B59B6",
      site:"Any sinus; may narrow nasal cavity",
      ct:"★ GROUND-GLASS matrix — HALLMARK\nExpansile, no periosteal reaction",
      mri:"Variable signal (fibrous vs. cystic)\nMild heterogeneous enhancement\nPrimary diagnosis = CT",
      key:"No malignant potential\nMonostotic > polyostotic",
    },
    {
      name:"MUCOCELE",
      color:C.gold,
      site:"Frontal > ethmoid > maxillary",
      ct:"Smooth expansile opacification\nBony remodeling (NOT destruction)\nDensity ↑ with protein content",
      mri:"T1: variable (low→high with protein)\nT2: high→low (inversely)\nNO internal enhancement ★",
      key:"Scalloped sinus expansion is hallmark\nWall may enhance; no solid component",
    },
    {
      name:"SCHWANNOMA",
      color:C.green,
      site:"Nasal cavity, ethmoid",
      ct:"Low-attenuation / near-cystic\nSmooth foraminal enlargement",
      mri:"T2: Bubbly hyperintense; cysts in large\nEnhancement: whorled pattern\nExcellent prognosis",
      key:"Nerve sheath origin\nSurgical excision curative",
    },
  ];

  lesions.forEach(({name,color,site,ct,mri,key}, i) => {
    const col = i % 2;
    const row = Math.floor(i/2);
    const x = col===0 ? 0.45 : 5.15;
    const y = 0.88 + row*2.35;

    s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
      x, y, w:4.55, h:2.18,
      fill:{color:"FFFFFF"}, line:{color, pt:2},
      rectRadius:0.08,
      shadow:{type:"outer", color:"000000", blur:5, offset:2, angle:135, opacity:0.1}
    });
    s.addShape(pres.shapes.RECTANGLE, {
      x, y, w:4.55, h:0.38,
      fill:{color}, line:{color}
    });
    s.addText(name, {
      x:x+0.08, y:y+0.04, w:4.38, h:0.3,
      fontSize:12, bold:true, color:C.white, fontFace:"Calibri",
      valign:"middle", margin:0
    });
    s.addText([
      {text:"📍 "+site+"\n", options:{bold:true, color:"333333", fontSize:9}},
      {text:"CT: ", options:{bold:true, color, fontSize:9}},
      {text:ct+"\n", options:{color:"333333", fontSize:9}},
      {text:"MRI: ", options:{bold:true, color:"8B44CC", fontSize:9}},
      {text:mri+"\n", options:{color:"333333", fontSize:9}},
      {text:"★ "+key, options:{italic:true, color:"666666", fontSize:8.5}},
    ], {
      x:x+0.1, y:y+0.43, w:4.35, h:1.72,
      fontFace:"Calibri", valign:"top"
    });
  });

  // Mucocele image bottom right
  if (img(10)) {
    s.addImage({ data:img(10), x:7.15, y:4.62, w:2.6, h:0.85, altText:"Frontal mucocele CT MRI" });
    s.addText("▲ Frontal sinus mucocele: expansion + no internal enhancement", {
      x:5.2, y:5.5, w:4.6, h:0.12,
      fontSize:6.5, italic:true, color:"666666", fontFace:"Calibri"
    });
  }
}

// ══════════════════════════════════════════════════════════════
// SLIDE 7 — JNA
// ══════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:5.625, fill:{color:C.dark}, line:{color:C.dark} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:0.72, fill:{color:"8B1A1A"}, line:{color:"8B1A1A"} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:0.35, h:5.625, fill:{color:C.accent}, line:{color:C.accent} });

  s.addText("JUVENILE NASOPHARYNGEAL ANGIOFIBROMA (JNA)", {
    x:0.6, y:0.12, w:9, h:0.48,
    fontSize:18, bold:true, color:C.white, fontFace:"Calibri"
  });

  // Demographics banner
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:0.5, y:0.88, w:9, h:0.45,
    fill:{color:C.accent, transparency:25}, line:{color:C.accent},
    rectRadius:0.06
  });
  s.addText("👨 ADOLESCENT MALES  |  Site: Sphenopalatine foramen → Nasopharynx  |  ⚠️ DO NOT BIOPSY — risk of massive haemorrhage", {
    x:0.6, y:0.88, w:8.8, h:0.45,
    fontSize:10, bold:true, color:C.white, fontFace:"Calibri",
    align:"center", valign:"middle", margin:0
  });

  // Features table
  const jnaRows = [
    ["CT", C.teal, "Intense early arterial enhancement\nHolman-Miller sign: anterior bowing of posterior antral wall ★\nVidian canal enlargement on CT"],
    ["MRI", "9B59B6", "T1: Intermediate signal\nT2: Intermediate-high + FLOW VOIDS (feeding vessels) ★\nIntense, homogeneous enhancement\n'Salt and pepper' pattern (large tumors)"],
    ["ANGIOGRAPHY", C.gold, "Preoperative embolization mandatory\nSupply from external carotid (internal maxillary artery)\nInternal carotid involvement in intracranial extension"],
    ["STAGING", C.green, "Radkowski / Andrews classification\nStage I: Limited to nasopharynx\nStage II: Pterygomaxillary / infratemporal involvement\nStage III: Intracranial extension"],
  ];

  jnaRows.forEach(([lbl, color, text], i) => {
    const y = 1.48 + i * 0.94;
    s.addShape(pres.shapes.RECTANGLE, { x:0.5, y, w:1.4, h:0.72, fill:{color}, line:{color} });
    s.addText(lbl, { x:0.5, y, w:1.4, h:0.72, fontSize:10, bold:true, color:C.dark, fontFace:"Calibri", align:"center", valign:"middle", margin:0 });
    s.addShape(pres.shapes.RECTANGLE, { x:1.9, y, w:5.0, h:0.72, fill:{color:C.mid}, line:{color:C.mid} });
    s.addText(text, { x:2.0, y:y+0.04, w:4.82, h:0.64, fontSize:9.5, color:C.white, fontFace:"Calibri", valign:"top" });
  });

  // Image
  if (img(3)) {
    s.addImage({ data:img(3), x:7.05, y:1.48, w:2.75, h:3.7, altText:"JNA MRI flow voids CT vidian canal" });
    s.addText("JNA: flow voids on MRI + vidian canal enlargement on CT", {
      x:7.05, y:5.2, w:2.75, h:0.22,
      fontSize:7, italic:true, color:C.light, fontFace:"Calibri", align:"center"
    });
  }
}

// ══════════════════════════════════════════════════════════════
// SLIDE 8 — MALIGNANT: SCC + ADENOCARCINOMA
// ══════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:5.625, fill:{color:"0D0D0D"}, line:{color:"0D0D0D"} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:0.72, fill:{color:"7A0000"}, line:{color:"7A0000"} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:0.35, h:5.625, fill:{color:C.accent}, line:{color:C.accent} });

  s.addText("MALIGNANT EPITHELIAL — SCC & Adenocarcinoma", {
    x:0.6, y:0.12, w:9, h:0.48,
    fontSize:18, bold:true, color:C.white, fontFace:"Calibri"
  });

  // SCC
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:0.45, y:0.83, w:5.2, h:4.65,
    fill:{color:"1A0000"}, line:{color:C.accent, pt:2},
    rectRadius:0.1
  });
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:0.45, y:0.83, w:5.2, h:0.5,
    fill:{color:C.accent}, line:{color:C.accent}, rectRadius:0.1
  });
  s.addShape(pres.shapes.RECTANGLE, { x:0.45, y:1.06, w:5.2, h:0.27, fill:{color:C.accent}, line:{color:C.accent} });
  s.addText("SQUAMOUS CELL CARCINOMA  (51.6%)", {
    x:0.55, y:0.85, w:5.0, h:0.44,
    fontSize:12, bold:true, color:C.white, fontFace:"Calibri",
    align:"center", valign:"middle", margin:0
  });

  const sccText = [
    ["SITE", "Maxillary sinus (most common malignancy site)"],
    ["CT", "Aggressive bone DESTRUCTION ★\nHeterogeneous mass ± necrosis\nCalcification rare"],
    ["MRI T1", "Isointense (non-specific)"],
    ["MRI T2", "Faintly hyperintense to muscle"],
    ["CE-MRI", "Moderate heterogeneous enhancement"],
    ["DWI", "Low ADC — hypercellular"],
    ["PNTS", "V2 → pterygopalatine fossa → foramen rotundum → Meckel's cave"],
    ["NODES", "Retropharyngeal + cervical if nasopharynx involved"],
  ];
  let sccY = 1.46;
  sccText.forEach(([lbl,val])=>{
    s.addShape(pres.shapes.RECTANGLE, { x:0.55, y:sccY, w:0.85, h:0.26, fill:{color:C.accent, transparency:30}, line:{color:C.accent} });
    s.addText(lbl, { x:0.55, y:sccY, w:0.85, h:0.26, fontSize:8, bold:true, color:C.white, fontFace:"Calibri", align:"center", valign:"middle", margin:0 });
    s.addText(val, { x:1.48, y:sccY+0.02, w:3.98, h:0.5, fontSize:9.5, color:C.white, fontFace:"Calibri", valign:"top" });
    sccY += val.includes("\n") ? 0.58 : 0.38;
  });

  if(img(4)){
    s.addImage({ data:img(4), x:0.5, y:4.42, w:2.4, h:1.0, altText:"SCC maxillary CT" });
    s.addText("SCC: bone destruction, maxillary sinus", { x:0.5, y:5.44, w:2.4, h:0.14, fontSize:6.5, italic:true, color:C.light, fontFace:"Calibri" });
  }
  if(img(5)){
    s.addImage({ data:img(5), x:3.0, y:4.42, w:2.5, h:1.0, altText:"SCC perineural spread CT MRI" });
    s.addText("SCC: perineural spread along V2", { x:3.0, y:5.44, w:2.5, h:0.14, fontSize:6.5, italic:true, color:C.light, fontFace:"Calibri" });
  }

  // Adenocarcinoma
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:5.78, y:0.83, w:4.02, h:4.65,
    fill:{color:"001A1A"}, line:{color:C.teal, pt:2},
    rectRadius:0.1
  });
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:5.78, y:0.83, w:4.02, h:0.5,
    fill:{color:C.teal}, line:{color:C.teal}, rectRadius:0.1
  });
  s.addShape(pres.shapes.RECTANGLE, { x:5.78, y:1.06, w:4.02, h:0.27, fill:{color:C.teal}, line:{color:C.teal} });
  s.addText("ADENOCARCINOMA  (12.6%)", {
    x:5.85, y:0.85, w:3.85, h:0.44,
    fontSize:11, bold:true, color:C.dark, fontFace:"Calibri",
    align:"center", valign:"middle", margin:0
  });

  const adText = [
    ["SITE", "Ethmoid >> maxillary\nIntestinal-type (ITAC) — woodworkers ★"],
    ["CT", "Lytic bone destruction\n± Calcifications (ITAC)"],
    ["MRI T2", "Variable; hyperintense areas = mucin"],
    ["CE-MRI", "Heterogeneous enhancement"],
    ["ADC", "Low (hypercellular)"],
    ["SPECIAL", "ITAC occupational link:\nWoodworkers, leather workers,\nnickel/chromate exposure"],
  ];
  let adY = 1.46;
  adText.forEach(([lbl,val])=>{
    s.addShape(pres.shapes.RECTANGLE, { x:5.88, y:adY, w:0.85, h:0.26, fill:{color:C.teal, transparency:30}, line:{color:C.teal} });
    s.addText(lbl, { x:5.88, y:adY, w:0.85, h:0.26, fontSize:8, bold:true, color:C.dark, fontFace:"Calibri", align:"center", valign:"middle", margin:0 });
    s.addText(val, { x:6.82, y:adY+0.02, w:2.85, h:0.62, fontSize:9.5, color:C.white, fontFace:"Calibri", valign:"top" });
    adY += val.includes("\n") ? 0.65 : 0.4;
  });
}

// ══════════════════════════════════════════════════════════════
// SLIDE 9 — ADENOID CYSTIC & SNUC
// ══════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:5.625, fill:{color:"F7F9FC"}, line:{color:"F7F9FC"} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:0.72, fill:{color:C.dark}, line:{color:C.dark} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:0.35, h:5.625, fill:{color:"9B59B6"}, line:{color:"9B59B6"} });

  s.addText("ADENOID CYSTIC CARCINOMA & SNUC", {
    x:0.6, y:0.12, w:9, h:0.48,
    fontSize:18, bold:true, color:C.white, fontFace:"Calibri"
  });

  // AdCC
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:0.45, y:0.83, w:4.75, h:4.7,
    fill:{color:C.dark}, line:{color:"9B59B6", pt:2},
    rectRadius:0.1,
    shadow:{type:"outer",color:"000000",blur:5,offset:2,angle:135,opacity:0.15}
  });
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:0.45, y:0.83, w:4.75, h:0.48,
    fill:{color:"9B59B6"}, line:{color:"9B59B6"}, rectRadius:0.1
  });
  s.addShape(pres.shapes.RECTANGLE, { x:0.45, y:1.0, w:4.75, h:0.31, fill:{color:"9B59B6"}, line:{color:"9B59B6"} });
  s.addText("ADENOID CYSTIC CARCINOMA (AdCC)", {
    x:0.55, y:0.85, w:4.55, h:0.42,
    fontSize:11.5, bold:true, color:C.white, fontFace:"Calibri",
    align:"center", valign:"middle", margin:0
  });

  s.addText([
    {text:"Site: ", options:{bold:true, color:C.gold, fontSize:10}},
    {text:"Maxillary sinus, nasal cavity (5% sinonasal malignancies)\n", options:{color:C.white, fontSize:10}},
    {text:"\nCT: ", options:{bold:true, color:C.teal, fontSize:10}},
    {text:"Irregular heterogeneous mass\nForaminal enlargement (V2 pathway) ★\n", options:{color:C.white, fontSize:10}},
    {text:"\nMRI T1/T2: ", options:{bold:true, color:"9B59B6", fontSize:10}},
    {text:"Iso- to hyperintense (varies with cellularity)\n", options:{color:"333333", fontSize:10}},
    {text:"\n★ PERINEURAL TUMOUR SPREAD (PNTS):\n", options:{bold:true, color:C.gold, fontSize:11}},
    {text:"• Enlargement + enhancement of affected nerve\n• Compare to contralateral side\n• V2: PPF → foramen rotundum → Meckel's cave\n• Skip lesions possible\n• Fat obliteration in PPF ★\n", options:{color:"333333", fontSize:10}},
    {text:"\nMets: ", options:{bold:true, color:C.accent, fontSize:10}},
    {text:"Lung → Liver → Bone (late); skip regional nodes", options:{color:"333333", fontSize:10}},
  ], {
    x:0.6, y:1.44, w:4.45, h:3.95,
    fontFace:"Calibri", valign:"top"
  });

  if(img(6)){
    s.addImage({ data:img(6), x:0.55, y:4.65, w:4.5, h:0.8, altText:"AdCC perineural spread MRI" });
    s.addText("AdCC: perineural spread along V2 into pterygopalatine fossa and Meckel's cave", {
      x:0.55, y:5.47, w:4.5, h:0.15,
      fontSize:6.5, italic:true, color:"666666", fontFace:"Calibri"
    });
  }

  // SNUC
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:5.35, y:0.83, w:4.45, h:4.7,
    fill:{color:C.dark}, line:{color:C.accent, pt:2},
    rectRadius:0.1,
    shadow:{type:"outer",color:"000000",blur:5,offset:2,angle:135,opacity:0.15}
  });
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:5.35, y:0.83, w:4.45, h:0.48,
    fill:{color:C.accent}, line:{color:C.accent}, rectRadius:0.1
  });
  s.addShape(pres.shapes.RECTANGLE, { x:5.35, y:1.0, w:4.45, h:0.31, fill:{color:C.accent}, line:{color:C.accent} });
  s.addText("SINONASAL UNDIFFERENTIATED CARCINOMA", {
    x:5.42, y:0.85, w:4.28, h:0.42,
    fontSize:10.5, bold:true, color:C.white, fontFace:"Calibri",
    align:"center", valign:"middle", margin:0
  });

  s.addText([
    {text:"3–5% of sinonasal cancers  |  Extremely aggressive\n\n", options:{bold:true, color:C.gold, fontSize:10}},
    {text:"Site: ", options:{bold:true, color:C.gold, fontSize:10}},
    {text:"Superior nasal cavity & ethmoid sinus\n\n", options:{color:C.white, fontSize:10}},
    {text:"CT: ", options:{bold:true, color:C.teal, fontSize:10}},
    {text:"Ill-defined, non-calcified mass\n★ Central necrosis on contrast CT\n\n", options:{color:C.white, fontSize:10}},
    {text:"MRI: ", options:{bold:true, color:"9B59B6", fontSize:10}},
    {text:"T1: Isointense + heterogeneous CE\nT2: Iso- to hyperintense\n\n", options:{color:C.white, fontSize:10}},
    {text:"DWI: ", options:{bold:true, color:C.teal, fontSize:10}},
    {text:"Low ADC (high cellularity)\n\n", options:{color:C.white, fontSize:10}},
    {text:"PET-CT: ", options:{bold:true, color:C.gold, fontSize:10}},
    {text:"FDG-avid; maps perineural spread\n\n", options:{color:C.white, fontSize:10}},
    {text:"⚠️ Presents late with extensive invasion\n(skull base · orbit · intracranial)", options:{bold:true, color:C.accent, fontSize:10}},
  ], {
    x:5.45, y:1.44, w:4.2, h:3.5,
    fontFace:"Calibri", valign:"top"
  });

  if(img(7)){
    s.addImage({ data:img(7), x:5.4, y:4.55, w:4.3, h:0.9, altText:"SNUC CT MRI PET" });
    s.addText("SNUC: central necrosis, perineural spread, FDG-avidity on PET-CT", {
      x:5.4, y:5.47, w:4.3, h:0.15,
      fontSize:6.5, italic:true, color:"666666", fontFace:"Calibri"
    });
  }
}

// ══════════════════════════════════════════════════════════════
// SLIDE 10 — ESTHESIONEUROBLASTOMA
// ══════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:5.625, fill:{color:C.dark}, line:{color:C.dark} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:0.72, fill:{color:"1A4A1A"}, line:{color:"1A4A1A"} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:0.35, h:5.625, fill:{color:C.green}, line:{color:C.green} });

  s.addText("ESTHESIONEUROBLASTOMA  (Olfactory Neuroblastoma)", {
    x:0.6, y:0.12, w:9, h:0.48,
    fontSize:18, bold:true, color:C.white, fontFace:"Calibri"
  });

  // Kadish staging box
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:0.45, y:0.83, w:3.05, h:3.55,
    fill:{color:C.mid}, line:{color:C.green, pt:2},
    rectRadius:0.1
  });
  s.addText("KADISH STAGING", {
    x:0.55, y:0.88, w:2.88, h:0.38,
    fontSize:11, bold:true, color:C.green, fontFace:"Calibri", align:"center"
  });

  const kadish = [
    ["A", C.green, "Confined to nasal cavity"],
    ["B", C.gold, "Extends to paranasal sinuses"],
    ["C", C.orange, "Beyond sinuses (orbit / skull base / intracranial)"],
    ["D", C.accent, "Cervical LN / distant metastasis"],
  ];
  kadish.forEach(([stage,color,desc],i)=>{
    const ky = 1.42 + i*0.7;
    s.addShape(pres.shapes.OVAL, { x:0.6, y:ky, w:0.44, h:0.44, fill:{color}, line:{color} });
    s.addText(stage, { x:0.6, y:ky, w:0.44, h:0.44, fontSize:14, bold:true, color:C.white, align:"center", valign:"middle", fontFace:"Calibri", margin:0 });
    s.addText(desc, { x:1.15, y:ky+0.04, w:2.25, h:0.36, fontSize:9.5, color:C.white, fontFace:"Calibri", valign:"middle" });
  });

  s.addShape(pres.shapes.RECTANGLE, { x:0.55, y:4.48, w:2.85, h:0.03, fill:{color:C.green,transparency:50}, line:{color:C.green,transparency:50} });
  s.addText("Bimodal: ages 11–20 & 50–60 yrs\nIncidence: 0.4 per million", {
    x:0.55, y:4.55, w:2.85, h:0.55,
    fontSize:9, italic:true, color:C.light, fontFace:"Calibri"
  });

  // Features box
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:3.65, y:0.83, w:3.15, h:4.65,
    fill:{color:C.mid}, line:{color:C.green, pt:1},
    rectRadius:0.1
  });
  s.addText("RADIOLOGICAL FEATURES", {
    x:3.75, y:0.88, w:2.98, h:0.38,
    fontSize:10, bold:true, color:C.green, fontFace:"Calibri", align:"center"
  });

  const enbFeatures = [
    ["SITE", "Superior nasal cavity\n(olfactory epithelium)"],
    ["CT", "Soft-tissue mass superior nasal cavity\nCribriform plate dehiscence ★\n± Calcifications\nFluid in paranasal sinuses"],
    ["MRI T1", "Hypointense"],
    ["MRI T2", "Hyperintense"],
    ["CE-MRI", "Moderate enhancement\n★ PERIPHERAL INTRACRANIAL CYSTS\nat tumor-brain interface"],
    ["DWI", "Intermediate ADC"],
    ["MRI SHAPE", "'Dumbbell' morphology\n— waist at cribriform plate"],
  ];
  let enY = 1.42;
  enbFeatures.forEach(([lbl,val])=>{
    s.addShape(pres.shapes.RECTANGLE, { x:3.72, y:enY, w:0.72, h:0.26, fill:{color:C.green, transparency:20}, line:{color:C.green} });
    s.addText(lbl, { x:3.72, y:enY, w:0.72, h:0.26, fontSize:7.5, bold:true, color:C.dark, fontFace:"Calibri", align:"center", valign:"middle", margin:0 });
    const lines = (val.match(/\n/g)||[]).length+1;
    const h = Math.max(0.26, lines*0.23+0.1);
    s.addText(val, { x:4.52, y:enY+0.02, w:2.2, h:h, fontSize:9, color:C.white, fontFace:"Calibri", valign:"top" });
    enY += Math.max(0.36, h+0.1);
  });

  // Images
  if(img(2)){
    s.addImage({ data:img(2), x:6.92, y:0.83, w:2.85, h:2.65, altText:"ENB dumbbell morphology cysts" });
    s.addText("ENB: dumbbell morphology + peripheral intracranial cysts", {
      x:6.92, y:3.5, w:2.85, h:0.25,
      fontSize:7, italic:true, color:C.light, fontFace:"Calibri", align:"center"
    });
  }
  if(img(11)){
    s.addImage({ data:img(11), x:6.92, y:3.82, w:2.85, h:1.62, altText:"ENB sagittal T1 intracranial extension" });
    s.addText("ENB Kadish C: intracranial extension, sagittal T1 CE-MRI", {
      x:6.92, y:5.46, w:2.85, h:0.18,
      fontSize:6.5, italic:true, color:C.light, fontFace:"Calibri", align:"center"
    });
  }
}

// ══════════════════════════════════════════════════════════════
// SLIDE 11 — MELANOMA & LYMPHOMA
// ══════════════════════════════════════════════════════════════
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  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:0.72, fill:{color:C.dark}, line:{color:C.dark} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:0.35, h:5.625, fill:{color:C.gold}, line:{color:C.gold} });

  s.addText("SINONASAL MELANOMA & LYMPHOMA  — Hallmark MRI Signals", {
    x:0.6, y:0.12, w:9, h:0.48,
    fontSize:18, bold:true, color:C.white, fontFace:"Calibri"
  });

  // MELANOMA
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:0.45, y:0.83, w:4.65, h:4.7,
    fill:{color:C.dark}, line:{color:C.gold, pt:2},
    rectRadius:0.1,
    shadow:{type:"outer",color:"000000",blur:5,offset:2,angle:135,opacity:0.15}
  });
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:0.45, y:0.83, w:4.65, h:0.48,
    fill:{color:C.gold}, line:{color:C.gold}, rectRadius:0.1
  });
  s.addShape(pres.shapes.RECTANGLE, { x:0.45, y:1.03, w:4.65, h:0.28, fill:{color:C.gold}, line:{color:C.gold} });
  s.addText("SINONASAL MELANOMA", {
    x:0.52, y:0.85, w:4.48, h:0.42,
    fontSize:13, bold:true, color:C.dark, fontFace:"Calibri",
    align:"center", valign:"middle", margin:0
  });

  s.addText([
    {text:"Site: ", options:{bold:true, color:C.gold, fontSize:10}},
    {text:"Nasal cavity (septum, lateral wall, inferior turbinate) >> sinuses\n\n", options:{color:"333333", fontSize:10}},
    {text:"CT: ", options:{bold:true, color:C.teal, fontSize:10}},
    {text:"Remodel OR destroy bone (variable)\nNon-specific soft-tissue mass\n\n", options:{color:"333333", fontSize:10}},
    {text:"★ MELANOTIC LESION (classic):\n", options:{bold:true, color:C.gold, fontSize:11}},
    {text:"T1: HYPERINTENSE  ←← melanin T1 shortening\nT2/STIR: HYPOINTENSE  ←← paramagnetic melanin\nEnhancement: variable; hard to see if T1-bright\n\n", options:{color:"333333", fontSize:10}},
    {text:"Amelanotic lesion: ", options:{bold:true, color:C.accent, fontSize:10}},
    {text:"signals non-specific → biopsy required\n\n", options:{color:"333333", fontSize:10}},
    {text:"DWI: ", options:{bold:true, color:C.teal, fontSize:10}},
    {text:"Restricted diffusion (high cellularity)\n\n", options:{color:"333333", fontSize:10}},
    {text:"⚠️ Worse prognosis than cutaneous melanoma", options:{bold:true, color:C.accent, fontSize:10}},
  ], {
    x:0.55, y:1.44, w:4.45, h:3.1,
    fontFace:"Calibri", valign:"top"
  });

  if(img(8)){
    s.addImage({ data:img(8), x:0.52, y:4.52, w:4.4, h:0.9, altText:"Sinonasal melanoma T1 bright MRI" });
    s.addText("Melanoma: T1 hyperintense due to paramagnetic melanin", {
      x:0.52, y:5.44, w:4.4, h:0.15, fontSize:6.5, italic:true, color:"555555", fontFace:"Calibri"
    });
  }

  // LYMPHOMA
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:5.22, y:0.83, w:4.55, h:4.7,
    fill:{color:C.dark}, line:{color:C.teal, pt:2},
    rectRadius:0.1,
    shadow:{type:"outer",color:"000000",blur:5,offset:2,angle:135,opacity:0.15}
  });
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:5.22, y:0.83, w:4.55, h:0.48,
    fill:{color:C.teal}, line:{color:C.teal}, rectRadius:0.1
  });
  s.addShape(pres.shapes.RECTANGLE, { x:5.22, y:1.03, w:4.55, h:0.28, fill:{color:C.teal}, line:{color:C.teal} });
  s.addText("SINONASAL LYMPHOMA", {
    x:5.3, y:0.85, w:4.35, h:0.42,
    fontSize:13, bold:true, color:C.dark, fontFace:"Calibri",
    align:"center", valign:"middle", margin:0
  });

  s.addText([
    {text:"NK/T-cell (ENKTL) or DLBCL\n\n", options:{bold:true, color:C.teal, fontSize:10}},
    {text:"Site: ", options:{bold:true, color:C.teal, fontSize:10}},
    {text:"Nasal cavity >> paranasal sinuses\n\n", options:{color:C.white, fontSize:10}},
    {text:"CT: ", options:{bold:true, color:C.teal, fontSize:10}},
    {text:"Bulky lobulated mass\n★ Hyperdense on NECT (high cellularity)\nBone remodeling OR destruction\n\n", options:{color:C.white, fontSize:10}},
    {text:"★ MRI KEY FEATURES:\n", options:{bold:true, color:C.teal, fontSize:11}},
    {text:"T1: Isointense to muscle\nT2/STIR: HYPOINTENSE ← high nuclear:cytoplasmic ratio\nCE: Homogeneous enhancement (homogeneous cells)\nNecrosis: uncommon (more in NK subtype)\n\n", options:{color:C.white, fontSize:10}},
    {text:"DWI: ", options:{bold:true, color:C.gold, fontSize:10}},
    {text:"Restricted diffusion (low ADC) ★\n\n", options:{color:C.white, fontSize:10}},
    {text:"NK/T-cell: ", options:{bold:true, color:C.accent, fontSize:10}},
    {text:"'Lethal midline granuloma'\nMidface destructive lesion", options:{color:C.white, fontSize:10}},
  ], {
    x:5.32, y:1.44, w:4.32, h:3.1,
    fontFace:"Calibri", valign:"top"
  });

  if(img(9)){
    s.addImage({ data:img(9), x:5.28, y:4.52, w:4.3, h:0.9, altText:"Sinonasal lymphoma T2 hypointense" });
    s.addText("Lymphoma: homogeneous CE, T2 hypointense, restricted DWI, bone remodeling/destruction", {
      x:5.28, y:5.44, w:4.3, h:0.15, fontSize:6.5, italic:true, color:C.light, fontFace:"Calibri"
    });
  }
}

// ══════════════════════════════════════════════════════════════
// SLIDE 12 — DECISION TREE SCHEMATIC
// ══════════════════════════════════════════════════════════════
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  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:5.625, fill:{color:C.dark}, line:{color:C.dark} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:0.72, fill:{color:"1A3D1A"}, line:{color:"1A3D1A"} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:0.35, h:5.625, fill:{color:C.green}, line:{color:C.green} });

  s.addText("SCHEMATIC DIAGNOSTIC ALGORITHM", {
    x:0.6, y:0.12, w:9, h:0.48,
    fontSize:20, bold:true, color:C.white, fontFace:"Calibri"
  });

  // Top node
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:3.3, y:0.83, w:3.4, h:0.52,
    fill:{color:"2C3E50"}, line:{color:C.white, pt:1.5},
    rectRadius:0.1
  });
  s.addText("SINONASAL MASS ON IMAGING", {
    x:3.3, y:0.83, w:3.4, h:0.52,
    fontSize:10, bold:true, color:C.white, fontFace:"Calibri",
    align:"center", valign:"middle", margin:0
  });

  // Arrows down
  s.addShape(pres.shapes.RECTANGLE, { x:3.8, y:1.35, w:0.04, h:0.2, fill:{color:C.teal}, line:{color:C.teal} });
  s.addShape(pres.shapes.RECTANGLE, { x:6.16, y:1.35, w:0.04, h:0.2, fill:{color:C.teal}, line:{color:C.teal} });

  // Bilateral/Unilateral
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:0.5, y:1.55, w:2.9, h:0.48,
    fill:{color:C.teal}, line:{color:C.teal}, rectRadius:0.08
  });
  s.addText("BILATERAL", {
    x:0.5, y:1.55, w:2.9, h:0.48,
    fontSize:12, bold:true, color:C.dark, fontFace:"Calibri",
    align:"center", valign:"middle", margin:0
  });

  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:6.6, y:1.55, w:2.9, h:0.48,
    fill:{color:C.accent}, line:{color:C.accent}, rectRadius:0.08
  });
  s.addText("UNILATERAL", {
    x:6.6, y:1.55, w:2.9, h:0.48,
    fontSize:12, bold:true, color:C.white, fontFace:"Calibri",
    align:"center", valign:"middle", margin:0
  });

  // Bilateral → benign
  s.addShape(pres.shapes.RECTANGLE, { x:1.95, y:2.03, w:0.04, h:0.22, fill:{color:C.teal}, line:{color:C.teal} });
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:0.5, y:2.25, w:2.9, h:0.55,
    fill:{color:C.mid}, line:{color:C.teal, pt:1}, rectRadius:0.08
  });
  s.addText("BENIGN POLYPOSIS\nSinonasal polyposis · REAH", {
    x:0.5, y:2.25, w:2.9, h:0.55,
    fontSize:9, color:C.white, fontFace:"Calibri",
    align:"center", valign:"middle", margin:0
  });

  // Unilateral branches
  s.addShape(pres.shapes.RECTANGLE, { x:8.05, y:2.03, w:0.04, h:0.22, fill:{color:C.accent}, line:{color:C.accent} });

  const branches = [
    { x:3.6, color:C.teal, label:"Bone\nREMODELING", items:"IP / JNA / Schwannoma\nPleomorphic Adenoma" },
    { x:5.7, color:C.gold, label:"Bone\nEXPANSION", items:"Mucocele\nFibrous Dysplasia\nOsteoma" },
    { x:7.8, color:C.accent, label:"Bone\nDESTRUCTION", items:"SCC · SNUC · Adenoca.\nMelanoma · Lymphoma\nENB · RMS" },
  ];
  // Draw branch connector
  s.addShape(pres.shapes.RECTANGLE, { x:3.62, y:2.25, w:4.6, h:0.04, fill:{color:C.accent,transparency:50}, line:{color:C.accent,transparency:50} });

  branches.forEach(({x,color,label,items})=>{
    s.addShape(pres.shapes.RECTANGLE, { x:x+0.62, y:2.25, w:0.04, h:0.24, fill:{color}, line:{color} });
    s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
      x, y:2.49, w:1.92, h:0.52,
      fill:{color}, line:{color}, rectRadius:0.07
    });
    s.addText(label, {
      x, y:2.49, w:1.92, h:0.52,
      fontSize:9.5, bold:true, color: color===C.gold ? C.dark : C.white, fontFace:"Calibri",
      align:"center", valign:"middle", margin:0
    });
    s.addShape(pres.shapes.RECTANGLE, { x:x+0.62, y:3.01, w:0.04, h:0.24, fill:{color}, line:{color} });
    s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
      x, y:3.25, w:1.92, h:0.7,
      fill:{color:C.mid}, line:{color, pt:1}, rectRadius:0.07
    });
    s.addText(items, {
      x:x+0.06, y:3.27, w:1.8, h:0.66,
      fontSize:8.5, color:C.white, fontFace:"Calibri",
      align:"center", valign:"middle"
    });
  });

  // MRI discriminators box
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:0.45, y:4.1, w:9.1, h:1.38,
    fill:{color:"1A2A1A"}, line:{color:C.green, pt:1.5}, rectRadius:0.1
  });
  s.addText("SPECIFIC MRI FEATURES — Narrow the Diagnosis", {
    x:0.55, y:4.12, w:8.9, h:0.3,
    fontSize:10, bold:true, color:C.green, fontFace:"Calibri", align:"center"
  });

  const discrim = [
    ["Cerebriform pattern", "Inverted Papilloma"],
    ["T1↑ / T2↓", "Melanoma"],
    ["T2↓ + Homog. CE", "Lymphoma"],
    ["PNTS V2", "AdCC / SCC"],
    ["Peripheral intracranial cysts", "Esthesioneuroblastoma"],
    ["Flow voids + young male", "JNA"],
    ["Arc-ring Ca++", "Chondrosarcoma"],
    ["Ground-glass CT", "Fibrous Dysplasia"],
  ];
  discrim.forEach(([feat,diag],i)=>{
    const col = i%4;
    const row = Math.floor(i/4);
    const dx = 0.6 + col*2.25;
    const dy = 4.5 + row*0.35;
    s.addText("▸ ", { x:dx, y:dy, w:0.2, h:0.3, fontSize:9, color:C.green, fontFace:"Calibri", margin:0 });
    s.addText(feat, { x:dx+0.18, y:dy, w:1.4, h:0.3, fontSize:8.5, bold:true, color:C.white, fontFace:"Calibri", margin:0 });
    s.addText("→ "+diag, { x:dx+0.18, y:dy+0.18, w:1.8, h:0.22, fontSize:7.5, italic:true, color:C.gold, fontFace:"Calibri", margin:0 });
  });
}

// ══════════════════════════════════════════════════════════════
// SLIDE 13 — QUICK REFERENCE TABLE
// ══════════════════════════════════════════════════════════════
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  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:0.65, fill:{color:C.dark}, line:{color:C.dark} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:0.35, h:5.625, fill:{color:C.gold}, line:{color:C.gold} });

  s.addText("QUICK REFERENCE — Hallmark Signs at a Glance", {
    x:0.5, y:0.1, w:9, h:0.45,
    fontSize:18, bold:true, color:C.white, fontFace:"Calibri"
  });

  const headers = ["TUMOR", "SITE", "CT KEY", "MRI KEY", "HALLMARK SIGN"];
  const colW = [1.55, 1.45, 1.9, 2.35, 2.25];
  const colX = [0.38, 1.93, 3.38, 5.28, 7.63];

  // Header row
  colX.forEach((x,i)=>{
    s.addShape(pres.shapes.RECTANGLE, { x, y:0.68, w:colW[i], h:0.34, fill:{color:C.dark}, line:{color:C.dark} });
    s.addText(headers[i], { x:x+0.05, y:0.68, w:colW[i]-0.05, h:0.34, fontSize:8.5, bold:true, color:C.gold, fontFace:"Calibri", valign:"middle", margin:0 });
  });

  const rows = [
    { data:["Nasal Polyp","Bilateral","Low atten.","T2 bright","Peripheral enhancement"], color:"EBF5FB" },
    { data:["Inverted Papilloma","Lat. nasal wall","Focal hyperostosis","CCP on T2/CE-T1","★ Cerebriform pattern"], color:"FEF9E7", bold:true },
    { data:["Osteoma","Frontal sinus","Dense ivory/ground-glass","Low T1/T2","Most common benign"], color:"EBF5FB" },
    { data:["JNA","Sphenopalatine","Intense early CE","Flow voids ★","Holman-Miller sign"], color:"FDEDEC", bold:true },
    { data:["Mucocele","Frontal > ethmoid","Bony expansion","No internal CE","Scalloped expansion"], color:"EBF5FB" },
    { data:["SCC","Maxillary","Bone destruction","Mod CE; PNTS V2","Most common (51.6%)"], color:"FDEDEC", bold:true },
    { data:["AdCC","Maxillary","Foraminal enlarge.","★ PNTS along V2","Perineural tracking"], color:"EBF5FB" },
    { data:["SNUC","Sup nasal/ethmoid","Central necrosis","Heterogen. CE","Rapid invasion"], color:"FDEDEC", bold:true },
    { data:["ENB","Sup nasal cavity","Cribriform erosion","★ Periph. cysts","Dumbbell morphology"], color:"EBF5FB" },
    { data:["Melanoma","Nasal cavity","Var. bone","★ T1↑ / T2↓","Paramagnetic melanin"], color:"FDEDEC", bold:true },
    { data:["Lymphoma","Nasal cavity","Hyperdense NECT","★ T2 hypointense","Homogeneous CE"], color:"EBF5FB" },
    { data:["Fibrous Dysplasia","Any sinus","★ Ground-glass","Variable","CT-based diagnosis"], color:"FDEDEC" },
  ];

  rows.forEach(({data,color,bold:bd},ri)=>{
    const ry = 1.02 + ri*0.38;
    colX.forEach((x,ci)=>{
      s.addShape(pres.shapes.RECTANGLE, { x, y:ry, w:colW[ci], h:0.36, fill:{color}, line:{color:"CCCCCC",pt:0.5} });
      s.addText(data[ci], {
        x:x+0.04, y:ry+0.01, w:colW[ci]-0.08, h:0.34,
        fontSize: ci===0 ? 8.5 : 8,
        bold: bd && ci===0,
        color: data[ci].includes("★") ? "#C0392B" : (ci===0 ? C.dark : "333333"),
        fontFace:"Calibri", valign:"middle"
      });
    });
  });
}

// ══════════════════════════════════════════════════════════════
// SLIDE 14 — PITFALLS & ADVANCED IMAGING
// ══════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:5.625, fill:{color:C.dark}, line:{color:C.dark} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:0.72, fill:{color:"3D1A00"}, line:{color:"3D1A00"} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:0.35, h:5.625, fill:{color:C.orange}, line:{color:C.orange} });

  s.addText("PITFALLS & ADVANCED IMAGING TECHNIQUES", {
    x:0.6, y:0.12, w:9, h:0.48,
    fontSize:18, bold:true, color:C.white, fontFace:"Calibri"
  });

  // Advanced imaging table
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:0.45, y:0.83, w:4.5, h:4.65,
    fill:{color:C.mid}, line:{color:C.orange, pt:1.5}, rectRadius:0.1
  });
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:0.45, y:0.83, w:4.5, h:0.44,
    fill:{color:C.orange}, line:{color:C.orange}, rectRadius:0.1
  });
  s.addShape(pres.shapes.RECTANGLE, { x:0.45, y:1.03, w:4.5, h:0.24, fill:{color:C.orange}, line:{color:C.orange} });
  s.addText("ADVANCED IMAGING ROLES", {
    x:0.52, y:0.85, w:4.35, h:0.4,
    fontSize:12, bold:true, color:C.dark, fontFace:"Calibri", align:"center", valign:"middle", margin:0
  });

  const advImaging = [
    [C.teal, "DWI / ADC", "Low ADC → malignant (hypercellular)\nHigh ADC → benign / mucus / cystic\nDifferentiates tumor from trapped secretions"],
    [C.gold, "DCE-MRI", "JNA: rapid arterial 'flush'\nMalignancy: wash-in/wash-out kinetics\nDifferentiates tumor from post-therapy changes"],
    ["F5A623", "18F-FDG PET-CT", "Staging SNUC, lymphoma, melanoma\nMaps perineural spread\nAssesses treatment response\nDetects distant metastases"],
    [C.accent, "CT Angiography", "JNA: preoperative embolization planning\nFeeding vessel identification\nMaps ICA involvement in large tumors"],
  ];
  let avY = 1.42;
  advImaging.forEach(([color,title,text])=>{
    s.addShape(pres.shapes.RECTANGLE, { x:0.55, y:avY, w:1.15, h:0.28, fill:{color}, line:{color} });
    s.addText(title, { x:0.55, y:avY, w:1.15, h:0.28, fontSize:8.5, bold:true, color:C.dark, fontFace:"Calibri", align:"center", valign:"middle", margin:0 });
    const lines = text.split("\n").length;
    const h = Math.max(0.38, lines*0.27+0.12);
    s.addText(text, { x:1.78, y:avY+0.01, w:3.0, h:h, fontSize:9.5, color:C.white, fontFace:"Calibri", valign:"top" });
    avY += Math.max(0.48, h+0.14);
  });

  // Pitfalls
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:5.1, y:0.83, w:4.65, h:4.65,
    fill:{color:C.mid}, line:{color:C.accent, pt:1.5}, rectRadius:0.1
  });
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x:5.1, y:0.83, w:4.65, h:0.44,
    fill:{color:C.accent}, line:{color:C.accent}, rectRadius:0.1
  });
  s.addShape(pres.shapes.RECTANGLE, { x:5.1, y:1.03, w:4.65, h:0.24, fill:{color:C.accent}, line:{color:C.accent} });
  s.addText("⚠️  PITFALLS TO AVOID", {
    x:5.18, y:0.85, w:4.48, h:0.4,
    fontSize:12, bold:true, color:C.white, fontFace:"Calibri", align:"center", valign:"middle", margin:0
  });

  const pitfalls = [
    ["1", C.teal, "Obstructed secretions mimic tumor on CT", "MRI solves it: secretions = T2 bright, NO solid enhancement; tumor = solid CE"],
    ["2", C.gold, "Fungal sinusitis mimics malignancy", "Can destroy bone; clinical context + biopsy; T2 hypointense fungal concretions"],
    ["3", C.orange, "Amelanotic melanoma lacks classic MRI", "T1 not bright → no melanin signal; biopsy mandatory"],
    ["4", C.green, "Lymphoma looks 'benign' on CE-MRI", "Key clue: T2 HYPOINTENSITY (high cellularity); don't miss it"],
    ["5", C.accent, "IP malignant transformation missed", "Loss of cerebriform pattern + bone destruction = SCC within IP; re-biopsy"],
    ["6", "9B59B6", "Tumor vs. post-op change on MRI", "Early post-op CE = normal; DWI + serial imaging help; PET-CT after 8–12 wks"],
  ];

  let pY = 1.46;
  pitfalls.forEach(([num,color,title,detail])=>{
    s.addShape(pres.shapes.OVAL, { x:5.2, y:pY, w:0.36, h:0.36, fill:{color}, line:{color} });
    s.addText(num, { x:5.2, y:pY, w:0.36, h:0.36, fontSize:10, bold:true, color:C.white, fontFace:"Calibri", align:"center", valign:"middle", margin:0 });
    s.addText(title, { x:5.65, y:pY, w:3.95, h:0.28, fontSize:9.5, bold:true, color:C.white, fontFace:"Calibri", valign:"top", margin:0 });
    s.addText(detail, { x:5.65, y:pY+0.28, w:3.95, h:0.36, fontSize:8.5, color:C.light, fontFace:"Calibri", italic:true, valign:"top", margin:0 });
    pY += 0.66;
  });
}

// ══════════════════════════════════════════════════════════════
// SLIDE 15 — SUMMARY / THANK YOU
// ══════════════════════════════════════════════════════════════
{
  const s = pres.addSlide();
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:10, h:5.625, fill:{color:C.dark}, line:{color:C.dark} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:0, w:0.35, h:5.625, fill:{color:C.accent}, line:{color:C.accent} });
  s.addShape(pres.shapes.RECTANGLE, { x:0, y:5.0, w:10, h:0.625, fill:{color:C.mid}, line:{color:C.mid} });

  s.addText("KEY TAKEAWAYS", {
    x:0.6, y:0.3, w:9, h:0.55,
    fontSize:26, bold:true, color:C.gold, fontFace:"Calibri"
  });
  s.addShape(pres.shapes.RECTANGLE, { x:0.6, y:0.88, w:8.8, h:0.04, fill:{color:C.accent}, line:{color:C.accent} });

  const takeaways = [
    [C.teal, "CT first, MRI second", "CT defines bony architecture; MRI maps soft tissue, perineural spread & secretions"],
    [C.gold, "Unilateral = suspect neoplasm", "Bilateral almost always benign; unilateral demands workup"],
    [C.accent, "Bone destruction vs. remodeling", "The single most important discriminator on CT"],
    [C.green, "Cerebriform pattern (CCP)", "Inverted papilloma; seen in 80% — do not miss"],
    ["9B59B6", "PNTS on MRI", "Adenoid cystic carcinoma; follow V2 to Meckel's cave"],
    [C.orange, "T1↑/T2↓ = Melanoma", "Paramagnetic melanin; amelanotic lacks this sign"],
    [C.teal, "T2↓ + homog CE = Lymphoma", "High cellularity = dark on T2; classic pitfall"],
    [C.gold, "Peripheral intracranial cysts = ENB", "Pathognomonic for esthesioneuroblastoma"],
  ];

  takeaways.forEach(([color,title,detail],i)=>{
    const col = i%2;
    const row = Math.floor(i/2);
    const x = col===0 ? 0.5 : 5.15;
    const y = 1.02 + row*0.94;

    s.addShape(pres.shapes.RECTANGLE, { x, y, w:0.06, h:0.7, fill:{color}, line:{color} });
    s.addText(title, { x:x+0.15, y:y+0.03, w:4.35, h:0.28, fontSize:10, bold:true, color:C.white, fontFace:"Calibri", margin:0 });
    s.addText(detail, { x:x+0.15, y:y+0.32, w:4.35, h:0.34, fontSize:8.5, color:C.light, fontFace:"Calibri", italic:true, margin:0 });
  });

  s.addText("Radiology of Sinonasal Tumors  |  A Schematic Approach  |  2026", {
    x:0.5, y:5.03, w:9, h:0.42,
    fontSize:9, color:C.light, fontFace:"Calibri", align:"center", italic:true
  });
}

// ─── Write file ──────────────────────────────────────────────────────────────
const outPath = "/home/daytona/workspace/sinonasal-pptx/Sinonasal_Tumors_Radiology.pptx";
pres.writeFile({ fileName: outPath }).then(() => {
  console.log("✅ Presentation written to: " + outPath);
}).catch(err => {
  console.error("❌ Error:", err);
  process.exit(1);
});

Running Command

cd /home/daytona/workspace/sinonasal-pptx && node build.js 2>&1

Running Command

ls -lh /home/daytona/workspace/sinonasal-pptx/Sinonasal_Tumors_Radiology.pptx

Your presentation is ready:

Sinonasal Tumors Radiology
Presentation · PPTX
— 1.3 MB, 15 slides

What's inside:

Slide	Content
1	Title slide — deep navy design with accent colors
2	Lecture outline / table of contents (8 sections)
3	CT vs MRI: when & why (schematic two-panel layout)
4	Bone patterns — the key discriminator (4-column comparison)
5	Polyps, Antrochoanal polyp & Inverted Papilloma — with cerebriform pattern MRI image
6	Osteoma, Fibrous Dysplasia, Mucocele, Schwannoma — with mucocele CT/MRI image
7	JNA — Holman-Miller sign, flow voids, angiography; with imaging
8	SCC & Adenocarcinoma — bone destruction, PNTS, ITAC link; with CT images
9	Adenoid Cystic Carcinoma & SNUC — PNTS tracking, central necrosis; with imaging
10	Esthesioneuroblastoma — Kadish staging diagram + dumbbell morphology images
11	Melanoma & Lymphoma — T1↑/T2↓ vs T2↓/homog CE; with comparative MRI images
12	Schematic diagnostic algorithm — decision tree (bilateral→unilateral → bone pattern → specific MRI signs)
13	Quick reference table — all 12 entities, CT key, MRI key, hallmark sign
14	Pitfalls & advanced imaging — DWI, PET-CT, DCE-MRI + 6 key pitfalls
15	Key takeaways summary

The design uses a dark navy/medical red palette with color-coded sections — benign lesions in teal/gold tones, malignancies in red/dark tones. All imaging examples are from peer-reviewed medical literature.

I want single slide of comparison of ct hrct cect mri t1,t2,Stir and Dwi

Reading File

Writing File

~/sinonasal-pptx/comparison_slide.js

const pptxgen = require("pptxgenjs");

const pres = new pptxgen();
pres.layout = "LAYOUT_WIDE"; // 13.3" × 7.5" — more room for 7 columns

const s = pres.addSlide();

// ─── PALETTE ────────────────────────────────────────────────────────────────
const C = {
  bg:       "0B1A2E",   // deep navy background
  header:   "0D2137",
  accent:   "E63946",   // red
  teal:     "00B4C8",
  gold:     "F4A833",
  purple:   "9B59B6",
  green:    "27AE60",
  orange:   "E67E22",
  pink:     "E91E8C",
  white:    "FFFFFF",
  light:    "A8C4D8",
  dark:     "0B1A2E",
  row1:     "112840",   // slightly lighter navy for alternating rows
  row2:     "0E2135",
};

// ─── COLUMN CONFIG ──────────────────────────────────────────────────────────
// 7 modality columns + 1 label column
// Total width = 13.3", left margin = 0.12"
const LABEL_W = 1.3;
const GAP = 0.06;
const N_COLS = 7;
const COL_W = (13.3 - 0.12 - 0.12 - LABEL_W - GAP * N_COLS) / N_COLS; // ≈1.6"
const START_X = 0.12;
const HEADER_H = 0.75;
const ROW_H = 0.72;
const TITLE_H = 0.55;

// Column definitions: [key, label, color, sub-label]
const cols = [
  { key:"ct",   label:"CT",      color:C.teal,   sub:"Bone & soft tissue"},
  { key:"hrct", label:"HRCT",    color:"00C9A7", sub:"Fine bone detail"},
  { key:"cect", label:"CECT",    color:C.gold,   sub:"Vascular / enhancement"},
  { key:"t1",   label:"MRI T1",  color:"6C5CE7", sub:"Anatomy / fat / blood"},
  { key:"t2",   label:"MRI T2",  color:C.purple, sub:"Fluid / oedema"},
  { key:"stir", label:"STIR",    color:C.pink,   sub:"Fat suppressed T2"},
  { key:"dwi",  label:"DWI/ADC", color:C.orange, sub:"Cellularity / restriction"},
];

function colX(i) {
  return START_X + LABEL_W + GAP + i * (COL_W + GAP);
}

// ─── BACKGROUND ─────────────────────────────────────────────────────────────
s.addShape(pres.shapes.RECTANGLE, {
  x:0, y:0, w:13.3, h:7.5,
  fill:{color:C.bg}, line:{color:C.bg}
});

// ─── TITLE BAR ──────────────────────────────────────────────────────────────
s.addShape(pres.shapes.RECTANGLE, {
  x:0, y:0, w:13.3, h:TITLE_H,
  fill:{color:C.header}, line:{color:C.header}
});
// left accent stripe
s.addShape(pres.shapes.RECTANGLE, {
  x:0, y:0, w:0.12, h:7.5,
  fill:{color:C.accent}, line:{color:C.accent}
});
s.addText("SINONASAL TUMORS — MULTIMODALITY IMAGING COMPARISON", {
  x:0.25, y:0.05, w:10, h:0.45,
  fontSize:16, bold:true, color:C.white, fontFace:"Calibri",
  charSpacing:2, valign:"middle", margin:0
});
s.addText("CT · HRCT · CECT · MRI T1 · T2 · STIR · DWI/ADC", {
  x:0.25, y:0.32, w:9, h:0.22,
  fontSize:8.5, color:C.light, fontFace:"Calibri", italic:true, margin:0
});

// ─── COLUMN HEADERS ─────────────────────────────────────────────────────────
cols.forEach(({label, color, sub}, i) => {
  const x = colX(i);
  const y = TITLE_H;
  s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
    x, y, w:COL_W, h:HEADER_H,
    fill:{color}, line:{color}, rectRadius:0.06
  });
  s.addText(label, {
    x, y:y+0.04, w:COL_W, h:0.38,
    fontSize:13, bold:true, color: (color===C.gold || color==="00C9A7") ? C.dark : C.white,
    fontFace:"Calibri", align:"center", valign:"middle", margin:0
  });
  s.addText(sub, {
    x, y:y+0.43, w:COL_W, h:0.28,
    fontSize:7.5, color: (color===C.gold || color==="00C9A7") ? C.dark : "FFFFFFBB",
    fontFace:"Calibri", align:"center", italic:true, margin:0
  });
});

// ─── ROW DATA ───────────────────────────────────────────────────────────────
// Each row: { label, color, data: [ct, hrct, cect, t1, t2, stir, dwi] }
const rows = [
  {
    label:"BONY\nINVOLVEMENT",
    color: C.teal,
    data:[
      "Best for bone\nRemodeling vs\ndestruction",
      "★ Superior detail\nCortical erosion\nFocal hyperostosis",
      "Same as CT\n(bone windows)",
      "Low signal\ncortical bone",
      "Low signal\ncortical; marrow\nhyperintense",
      "Low cortex\nMarrow: fat\nsuppressed bright",
      "Not useful\nfor bone",
    ]
  },
  {
    label:"SOFT\nTISSUE\nMASS",
    color: C.gold,
    data:[
      "Intermediate\nattenuation\n(soft tissue)",
      "Limited soft\ntissue contrast;\nbony margins",
      "Enhancing mass\nvs. necrosis\nvs. secretions",
      "Iso-/hypointense\n(most tumors)",
      "Iso- to\nhyperintense\nvs. muscle",
      "Hyperintense\n(fat suppressed);\nbone marrow:",
      "Hyperintense\n(restricted)\n= malignant ★",
    ]
  },
  {
    label:"SECRETIONS\nvs. TUMOR",
    color: "3A9BD5",
    data:[
      "Both iso-dense;\npoor distinction",
      "Poor\ndistinction",
      "Secretions:\nno enhance.\nTumor: CE ★",
      "Both isointense;\npoor distinction",
      "Secretions: T2\nbright; Tumor:\nvariable ★",
      "Secretions:\nvery bright;\nTumor: less",
      "Secretions: high\nADC; Tumor:\nlow ADC ★",
    ]
  },
  {
    label:"PERINEURAL\nSPREAD\n(PNTS)",
    color: C.purple,
    data:[
      "Foraminal\nenlargement;\nPPF fat loss",
      "Better\nforaminal\ndetail",
      "Nerve enhance\n+ enlargement\nvs. normal side",
      "Fat obliteration\nin PPF; nerve\nenlargement",
      "Loss of normal\nnerve T2 signal;\nperineural fat",
      "Fat suppressed:\nhighlights nerve\nenhancement",
      "Limited role\nfor PNTS\nassessment",
    ]
  },
  {
    label:"TUMOUR\nVASCULARITY",
    color: C.accent,
    data:[
      "Hypervascular:\nhyperdense;\nfeeding artery",
      "Not primary\nuse for\nvascularity",
      "★ BEST modality\nEarly arterial\nenhancement",
      "Flow voids in\nhypervascular\ntumors (JNA)",
      "Flow voids;\nhigh signal\ncystic areas",
      "Flow voids\nretained on\nfat suppressed",
      "High perfusion\n= high TBF on\npCASL/DCE",
    ]
  },
  {
    label:"INTRA-\nCRANIAL\nEXTENSION",
    color: C.green,
    data:[
      "Cribriform\nplate erosion;\nfovea ethmoidalis",
      "Cribriform plate\ndetail; fine\nosseous erosion",
      "Dural enhance;\ntumor vs.\nCSF margin",
      "T1 shows\nbrain invasion;\nmarrow invasion",
      "★ BEST: dural\nseeding; edema;\ncapping cysts",
      "Edema bright;\nbone marrow\ninvasion",
      "Restricted\ntumor vs. normal\nbrain parenchyma",
    ]
  },
  {
    label:"HALLMARK\nSIGNS",
    color: C.orange,
    data:[
      "Bone destruction\nvs. remodeling\nGround-glass FD",
      "Arc-ring Ca++\n(chondrosarcoma)\nHyperosto. (IP)",
      "Intense CE: JNA\nHeterogeneous:\nSCC / SNUC",
      "T1 bright:\nMelanoma ★\nFlow voids: JNA",
      "CCP (IP) ★\nPeriph. cysts:\nENB ★ T2↓: NHL",
      "Edema & fat\nsuppression\nenhances PNTS",
      "Low ADC:\nmalignancy ★\nHigh ADC: cyst",
    ]
  },
];

// ─── DRAW ROWS ───────────────────────────────────────────────────────────────
const ROW_START_Y = TITLE_H + HEADER_H + 0.04;

rows.forEach(({label, color, data}, ri) => {
  const y = ROW_START_Y + ri * ROW_H;
  const rowFill = ri % 2 === 0 ? C.row1 : C.row2;

  // Row background
  s.addShape(pres.shapes.RECTANGLE, {
    x:START_X + 0.12, y, w:13.3 - START_X - 0.24, h:ROW_H - 0.03,
    fill:{color:rowFill}, line:{color:rowFill}
  });

  // Label cell
  s.addShape(pres.shapes.RECTANGLE, {
    x:START_X + 0.12, y, w:LABEL_W - 0.04, h:ROW_H - 0.03,
    fill:{color}, line:{color}
  });
  s.addText(label, {
    x:START_X + 0.12, y:y+0.02, w:LABEL_W - 0.04, h:ROW_H - 0.07,
    fontSize:9, bold:true,
    color: (color===C.gold || color==="3A9BD5" || color==="00C9A7") ? C.dark : C.white,
    fontFace:"Calibri", align:"center", valign:"middle", margin:0
  });

  // Data cells
  data.forEach((text, ci) => {
    const x = colX(ci);
    const colColor = cols[ci].color;

    // Subtle left border accent per column
    s.addShape(pres.shapes.RECTANGLE, {
      x, y:y+0.04, w:0.04, h:ROW_H - 0.1,
      fill:{color:colColor, transparency:40}, line:{color:colColor, transparency:40}
    });

    // Highlight ★ items with a faint background
    const hasStar = text.includes("★");
    if (hasStar) {
      s.addShape(pres.shapes.ROUNDED_RECTANGLE, {
        x:x+0.06, y:y+0.02, w:COL_W - 0.08, h:ROW_H - 0.07,
        fill:{color:colColor, transparency:82}, line:{color:colColor, transparency:60},
        rectRadius:0.04
      });
    }

    // Parse text: ★ in bold gold, rest normal
    const parts = text.split("★");
    if (parts.length === 1) {
      s.addText(text, {
        x:x+0.1, y:y+0.04, w:COL_W - 0.14, h:ROW_H - 0.1,
        fontSize:8.5, color:C.white, fontFace:"Calibri",
        valign:"middle", align:"left"
      });
    } else {
      // Rich text with ★ highlighted
      const richArr = [];
      parts.forEach((part, pi) => {
        if (part) {
          // split by \n for line breaks
          const lines = part.split("\n");
          lines.forEach((line, li) => {
            const isLast = pi === parts.length - 1 && li === lines.length - 1;
            richArr.push({
              text: line,
              options: {
                color: C.white,
                fontSize: 8.5,
                breakLine: !isLast
              }
            });
          });
        }
        if (pi < parts.length - 1) {
          richArr.push({
            text: "★",
            options: { color: C.gold, bold: true, fontSize: 9 }
          });
        }
      });
      s.addText(richArr, {
        x:x+0.1, y:y+0.04, w:COL_W - 0.14, h:ROW_H - 0.1,
        fontFace:"Calibri", valign:"middle", align:"left"
      });
    }
  });
});

// ─── COLUMN DIVIDERS (subtle vertical lines) ─────────────────────────────────
cols.forEach((_, i) => {
  const x = colX(i) - GAP / 2;
  s.addShape(pres.shapes.RECTANGLE, {
    x, y:TITLE_H, w:0.015, h:7.5 - TITLE_H,
    fill:{color:"FFFFFF", transparency:88}, line:{color:"FFFFFF", transparency:88}
  });
});

// ─── BOTTOM LEGEND BAR ───────────────────────────────────────────────────────
const legendY = ROW_START_Y + rows.length * ROW_H + 0.04;
s.addShape(pres.shapes.RECTANGLE, {
  x:START_X + 0.12, y:legendY, w:13.3 - START_X - 0.24, h:0.28,
  fill:{color:"0D2137"}, line:{color:C.teal}
});
s.addText([
  {text:"★ = Hallmark / most useful finding for that category    ", options:{color:C.gold, bold:true, fontSize:8}},
  {text:"IP = Inverted Papilloma    ", options:{color:C.light, fontSize:7.5}},
  {text:"ENB = Esthesioneuroblastoma    ", options:{color:C.light, fontSize:7.5}},
  {text:"JNA = Juvenile Nasopharyngeal Angiofibroma    ", options:{color:C.light, fontSize:7.5}},
  {text:"SNUC = Sinonasal Undifferentiated Carcinoma    ", options:{color:C.light, fontSize:7.5}},
  {text:"NHL = Lymphoma    ", options:{color:C.light, fontSize:7.5}},
  {text:"FD = Fibrous Dysplasia    ", options:{color:C.light, fontSize:7.5}},
  {text:"PPF = Pterygopalatine Fossa", options:{color:C.light, fontSize:7.5}},
], {
  x:START_X + 0.2, y:legendY+0.02, w:13.0, h:0.24,
  fontFace:"Calibri", valign:"middle", align:"left"
});

// ─── WRITE ───────────────────────────────────────────────────────────────────
const outPath = "/home/daytona/workspace/sinonasal-pptx/Sinonasal_Imaging_Comparison.pptx";
pres.writeFile({ fileName: outPath }).then(() => {
  console.log("✅ Written: " + outPath);
}).catch(err => {
  console.error("❌", err);
  process.exit(1);
});

Running Command

cd /home/daytona/workspace/sinonasal-pptx && node comparison_slide.js 2>&1

Editing File

~/sinonasal-pptx/comparison_slide.js

Error: String not found in file: '    color: (color===C.gold || color==="00C9A7") ? C.dark : "FFFFFFBB",'

The file already built fine with warnings only (not errors). The PPTX file is valid. Here it is:

Sinonasal Imaging Comparison
Presentation · PPTX

What's on the slide (WIDE 13.3" × 7.5" format):

A single dense comparison table with 7 modality columns across the top (each color-coded) and 7 clinical rows down the left:

Row	Coverage
Bony Involvement	Who shows remodeling vs. destruction best
Soft Tissue Mass	Attenuation / signal characteristics per modality
Secretions vs. Tumor	How each modality differentiates the two (CECT & T2 are ★)
Perineural Spread (PNTS)	Fat-sat MRI & CECT are key; foraminal enlargement on CT
Tumour Vascularity	CECT ★; flow voids on T1/T2; JNA pattern
Intracranial Extension	T2 ★ best; capping cysts (ENB); dural seeding
Hallmark Signs	Modality-specific pearls (CCP, T1-bright melanoma, low ADC, etc.)

Cells marked ★ are highlighted with a subtle color glow so the key findings pop immediately during your lecture. A legend bar at the bottom decodes the abbreviations (IP, ENB, JNA, SNUC, NHL, FD, PPF).

I wanted overall differenc of this iamging system so that can help with differential diagnosi

Writing File

~/sinonasal-pptx/ddx_comparison.js

const pptxgen = require("pptxgenjs");

const pres = new pptxgen();
pres.layout = "LAYOUT_WIDE"; // 13.3" × 7.5"

const s = pres.addSlide();

// ─── PALETTE ─────────────────────────────────────────────────────────────────
const C = {
  bg:     "06111F",
  hdr:    "0B1E35",
  white:  "FFFFFF",
  light:  "9BBCCC",
  dark:   "06111F",
  // row label colors (by category)
  benign: "1A8A6E",   // teal-green
  malig:  "C0392B",   // deep red
  // column header colors
  CT:     "1ABC9C",
  HRCT:   "16A085",
  CECT:   "F39C12",
  T1:     "8E44AD",
  T2:     "2980B9",
  STIR:   "D81B60",
  DWI:    "E67E22",
  // row alternating fill
  even:   "0B1E35",
  odd:    "091828",
};

// ─── LAYOUT MATH ─────────────────────────────────────────────────────────────
const LABEL_W  = 1.58;  // diagnosis label column
const COL_W    = 1.60;  // each modality column
const GAP      = 0.0;   // no gap — borders handle separation
const LX       = 0.10;  // left start x
const TITLE_H  = 0.52;
const HDR_H    = 0.60;
const ROW_H    = 0.53;
const N_COLS   = 7;

const modCols = [
  { key:"CT",   label:"CT",       sub:"Bone/soft tissue",   color:C.CT   },
  { key:"HRCT", label:"HRCT",     sub:"Fine bone detail",   color:C.HRCT },
  { key:"CECT", label:"CECT",     sub:"Enhancement",        color:C.CECT },
  { key:"T1",   label:"MRI T1",   sub:"Fat / blood / anat", color:C.T1   },
  { key:"T2",   label:"MRI T2",   sub:"Fluid / oedema",     color:C.T2   },
  { key:"STIR", label:"STIR",     sub:"Fat-suppressed T2",  color:C.STIR },
  { key:"DWI",  label:"DWI/ADC",  sub:"Cellularity",        color:C.DWI  },
];

function cx(colIdx) { return LX + LABEL_W + colIdx * COL_W; }

// ─── ROW DATA ─────────────────────────────────────────────────────────────────
// Format: "signal: detail" — signal shown bold in column color, detail in white
// ★ = diagnostic hallmark → highlighted cell
// Each row: { label, cat, ct, hrct, cect, t1, t2, stir, dwi }
const rows = [
  // ── BENIGN ─────────────────────────────────────────────────────────────────
  {
    label:"Nasal Polyps", cat:"B",
    CT:   "Low atten.\nBilateral; remodel",
    HRCT: "Mucosal thickening\nOstiomeatal complex",
    CECT: "Peripheral rim CE\nNo solid enhancement",
    T1:   "Hypointense\nLow signal",
    T2:   "★ Hyperintense\n(high water)",
    STIR: "Very bright\nfat suppressed",
    DWI:  "High ADC\n(non-cellular)",
  },
  {
    label:"Antrochoanal\nPolyp", cat:"B",
    CT:   "Unilateral dumbbell\nMax sinus→choana",
    HRCT: "Accessory ostium\nenlargement",
    CECT: "Peripheral CE only\nNo solid component",
    T1:   "Iso-/hypointense",
    T2:   "★ Bright; dumbbell\nshape through choana",
    STIR: "Bright; clear\noutline",
    DWI:  "High ADC\n(benign fluid)",
  },
  {
    label:"Inverted\nPapilloma", cat:"B",
    CT:   "Soft tissue mass\n★ Focal hyperostosis",
    HRCT: "★ Hyperostosis\nat attachment ★",
    CECT: "Moderate CE\nvs. polyp",
    T1:   "Iso-/hypointense\nvs. muscle",
    T2:   "★ Cerebriform\nPattern (CCP) ★",
    STIR: "CCP preserved\nfat suppressed",
    DWI:  "Intermediate ADC\n(not low)",
  },
  {
    label:"Osteoma", cat:"B",
    CT:   "★ Dense ivory OR\nground-glass ★",
    HRCT: "★ Best modality\nfine density ★",
    CECT: "Mild CE\nor none",
    T1:   "Low signal\ncortical bone",
    T2:   "Low signal\ncortical bone",
    STIR: "Low signal\ncortical",
    DWI:  "Not useful\nlow signal",
  },
  {
    label:"Fibrous\nDysplasia", cat:"B",
    CT:   "★ Ground-glass\nmatrix ★",
    HRCT: "★ Best: ground-\nglass expansile ★",
    CECT: "Mild hetero. CE\nvariable",
    T1:   "Variable (fibrous\nvs cystic ratio)",
    T2:   "Variable T2\nfibrous = low",
    STIR: "Variable; bright\nif cystic foci",
    DWI:  "High ADC\n(fibrous tissue)",
  },
  {
    label:"JNA", cat:"B",
    CT:   "Hyperdense mass\nPPF, sphenopalatine",
    HRCT: "Vidian canal\nenlargement",
    CECT: "★ Intense early\narterial CE ★",
    T1:   "Intermediate\n★ Flow voids ★",
    T2:   "★ Flow voids\nsalt-and-pepper ★",
    STIR: "Flow voids\nretained",
    DWI:  "★ High TBF\npCASL perfusion",
  },
  {
    label:"Mucocele", cat:"B",
    CT:   "Sinus expansion\nBony remodeling ★",
    HRCT: "Thinned sinus\nwalls; no erosion",
    CECT: "Wall CE only\nNo internal CE ★",
    T1:   "Variable\n(low→high protein)",
    T2:   "★ High T2 (fluid)\nor low if inspiss.",
    STIR: "Bright if fluid;\nlow if inspissated",
    DWI:  "High ADC\n(non-cellular fluid)",
  },
  {
    label:"Schwannoma", cat:"B",
    CT:   "Low atten. / cystic\nForaminal remodel",
    HRCT: "Smooth foraminal\nenlargement",
    CECT: "Whorled pattern\nvariable CE",
    T1:   "Intermediate\n(iso-/hypointense)",
    T2:   "★ Bubbly hyperin-\ntense; cysts ★",
    STIR: "Bright; cysts\nhighlighted",
    DWI:  "High ADC\n(mixed cellularity)",
  },

  // ── MALIGNANT ──────────────────────────────────────────────────────────────
  {
    label:"SCC\n(51.6%)", cat:"M",
    CT:   "★ Bone destruction\nHetero. mass ★",
    HRCT: "Cortical erosion\nbest detail",
    CECT: "Mod. CE\n± Necrosis",
    T1:   "Isointense\n(non-specific)",
    T2:   "Faint hyperintense\nvs. muscle",
    STIR: "Bright; PPF fat\nobliteration",
    DWI:  "★ Low ADC\nhypercellular ★",
  },
  {
    label:"Adenocarcinoma\n(ITAC)", cat:"M",
    CT:   "Lytic destruction\n± Calcifications",
    HRCT: "Ethmoid detail;\nosseous erosion",
    CECT: "Hetero. CE\n± Mucin pools",
    T1:   "Isointense\n(similar SCC)",
    T2:   "★ Hyperintense\nareas = mucin ★",
    STIR: "Bright mucin\nfoci",
    DWI:  "Low ADC\nhypercellular",
  },
  {
    label:"Adenoid Cystic\n(AdCC)", cat:"M",
    CT:   "Foraminal enlarge.\nPPF involvement",
    HRCT: "★ Foraminal\nerosion detail ★",
    CECT: "★ PNTS: nerve CE\nvs. contralateral ★",
    T1:   "★ PPF fat loss\nNerve enlargement",
    T2:   "Iso-/hyperintense\nvaries cellularity",
    STIR: "★ Fat suppressed:\nPNTS highlighted ★",
    DWI:  "Intermediate ADC\n(tubular pattern)",
  },
  {
    label:"SNUC", cat:"M",
    CT:   "Ill-defined mass\n★ Central necrosis ★",
    HRCT: "Rapid bone\ndestruction",
    CECT: "★ Necrosis: non-\nenhancing center ★",
    T1:   "Isointense\nhetero. CE",
    T2:   "Iso-/hyperintense\nheterogeneous",
    STIR: "Bright; orbital/\nskull base spread",
    DWI:  "★ Very low ADC\nhighly cellular ★",
  },
  {
    label:"Esthesio-\nneuroblastoma", cat:"M",
    CT:   "Cribriform erosion\nSuperior nasal mass",
    HRCT: "★ Cribriform plate\ndetail ★",
    CECT: "Moderate CE\ndural enhancement",
    T1:   "Hypointense\ndumbbell shape",
    T2:   "★ Hyperintense;\nPeripheral cysts ★",
    STIR: "Bright; oedema\naround tumor",
    DWI:  "Low-intermediate\nADC",
  },
  {
    label:"Sinonasal\nMelanoma", cat:"M",
    CT:   "Variable bone\n(remodel/destroy)",
    HRCT: "Non-specific\nbony erosion",
    CECT: "Variable CE\nhard if T1-bright",
    T1:   "★ HYPERINTENSE\nmelanin T1 ★",
    T2:   "★ HYPOINTENSE\nparamagnetic ★",
    STIR: "★ Low signal\nfat-suppressed ★",
    DWI:  "Restricted DWI\nLow ADC",
  },
  {
    label:"Lymphoma\n(NHL/NKT)", cat:"M",
    CT:   "★ Hyperdense NECT\nhigh cellularity ★",
    HRCT: "Remodel or\ndestruction",
    CECT: "★ Homogeneous CE\n(uniform cells) ★",
    T1:   "Isointense\n(non-specific)",
    T2:   "★ HYPOINTENSE\nhigh N:C ratio ★",
    STIR: "★ Low / dark\nhigh cellularity ★",
    DWI:  "★ Very low ADC\nhighly restricted ★",
  },
  {
    label:"Rhabdo-\nmyosarcoma", cat:"M",
    CT:   "Aggressive bone\ndestruction; child",
    HRCT: "Orbita / skull\nbase erosion",
    CECT: "Moderate hetero.\nCE; necrosis",
    T1:   "Isointense\nvs. muscle",
    T2:   "Hyperintense\nhomogeneous",
    STIR: "Bright; orbital\ninvasion",
    DWI:  "★ Low ADC\npediatric mass ★",
  },
  {
    label:"Chondro-\nsarcoma", cat:"M",
    CT:   "★ Arc-ring Ca++\nchondroid matrix ★",
    HRCT: "★ Best: calcif.\ndetail arc-ring ★",
    CECT: "Peripheral / septal\nCE; lobulated",
    T1:   "Intermediate\nlow signal matrix",
    T2:   "★ Bright lobular\n'bunch of grapes' ★",
    STIR: "Very bright\nchondroid foci",
    DWI:  "High ADC\nchondroid matrix",
  },
];

// ─── BACKGROUND ──────────────────────────────────────────────────────────────
s.addShape(pres.shapes.RECTANGLE, {
  x:0, y:0, w:13.3, h:7.5,
  fill:{color:C.bg}, line:{color:C.bg}
});

// ─── TITLE ───────────────────────────────────────────────────────────────────
s.addShape(pres.shapes.RECTANGLE, {
  x:0, y:0, w:13.3, h:TITLE_H,
  fill:{color:C.hdr}, line:{color:C.hdr}
});
// left accent bar
s.addShape(pres.shapes.RECTANGLE, {
  x:0, y:0, w:0.10, h:7.5,
  fill:{color:"E63946"}, line:{color:"E63946"}
});
s.addText("SINONASAL DIFFERENTIAL DIAGNOSIS — MULTIMODALITY IMAGING", {
  x:0.18, y:0.05, w:9.5, h:0.28,
  fontSize:14.5, bold:true, color:C.white, fontFace:"Calibri",
  charSpacing:1, valign:"middle", margin:0
});
s.addText("CT  ·  HRCT  ·  CECT  ·  MRI T1  ·  MRI T2  ·  STIR  ·  DWI/ADC     |     ★ = Pathognomonic / Most Useful Sign", {
  x:0.18, y:0.33, w:13.0, h:0.18,
  fontSize:8, color:C.light, fontFace:"Calibri", italic:true, margin:0
});

// ─── CATEGORY LEGEND ─────────────────────────────────────────────────────────
s.addShape(pres.shapes.RECTANGLE, {
  x:10.0, y:0.06, w:0.14, h:0.18, fill:{color:C.benign}, line:{color:C.benign}
});
s.addText("Benign", { x:10.16, y:0.06, w:0.7, h:0.18, fontSize:8, color:C.light, fontFace:"Calibri", valign:"middle", margin:0 });
s.addShape(pres.shapes.RECTANGLE, {
  x:10.9, y:0.06, w:0.14, h:0.18, fill:{color:C.malig}, line:{color:C.malig}
});
s.addText("Malignant", { x:11.06, y:0.06, w:0.9, h:0.18, fontSize:8, color:C.light, fontFace:"Calibri", valign:"middle", margin:0 });

// ─── COLUMN HEADERS ──────────────────────────────────────────────────────────
const HDR_Y = TITLE_H;
modCols.forEach(({label, sub, color}, ci) => {
  const x = cx(ci);
  s.addShape(pres.shapes.RECTANGLE, {
    x, y:HDR_Y, w:COL_W, h:HDR_H,
    fill:{color}, line:{color:"000000", pt:0.4}
  });
  s.addText(label, {
    x, y:HDR_Y+0.04, w:COL_W, h:0.32,
    fontSize:12, bold:true,
    color: (color===C.CECT || color===C.CT || color===C.HRCT) ? C.dark : C.white,
    fontFace:"Calibri", align:"center", valign:"middle", margin:0
  });
  s.addText(sub, {
    x, y:HDR_Y+0.36, w:COL_W, h:0.22,
    fontSize:7,
    color: (color===C.CECT || color===C.CT || color===C.HRCT) ? "333333" : "DDDDDD",
    fontFace:"Calibri", align:"center", italic:true, margin:0
  });
});

// Diagnosis label header
s.addShape(pres.shapes.RECTANGLE, {
  x:LX, y:HDR_Y, w:LABEL_W, h:HDR_H,
  fill:{color:"1C2D3E"}, line:{color:"000000", pt:0.4}
});
s.addText("DIAGNOSIS", {
  x:LX, y:HDR_Y, w:LABEL_W, h:HDR_H,
  fontSize:11, bold:true, color:C.light, fontFace:"Calibri",
  align:"center", valign:"middle", margin:0, charSpacing:2
});

// ─── CATEGORY DIVIDER LABELS (BENIGN / MALIGNANT) ────────────────────────────
const BENIGN_ROWS = 8;
const ROW_START_Y = HDR_Y + HDR_H;

function rowY(ri) { return ROW_START_Y + ri * ROW_H; }

// "BENIGN" marker before row 0
s.addShape(pres.shapes.RECTANGLE, {
  x:LX, y:rowY(0), w:0.10, h:BENIGN_ROWS * ROW_H,
  fill:{color:C.benign}, line:{color:C.benign}
});
s.addShape(pres.shapes.RECTANGLE, {
  x:LX, y:rowY(BENIGN_ROWS), w:0.10, h:(rows.length - BENIGN_ROWS) * ROW_H,
  fill:{color:C.malig}, line:{color:C.malig}
});

// ─── ROWS ─────────────────────────────────────────────────────────────────────
rows.forEach((row, ri) => {
  const y  = rowY(ri);
  const isBenign = ri < BENIGN_ROWS;
  const catColor = isBenign ? C.benign : C.malig;
  const rowFill  = ri % 2 === 0 ? C.even : C.odd;

  // Row background
  s.addShape(pres.shapes.RECTANGLE, {
    x:LX + 0.10, y, w:13.3 - LX - 0.10, h:ROW_H,
    fill:{color:rowFill}, line:{color:rowFill}
  });

  // Label cell
  s.addShape(pres.shapes.RECTANGLE, {
    x:LX + 0.10, y, w:LABEL_W - 0.10, h:ROW_H,
    fill:{color:catColor, transparency:70}, line:{color:catColor, transparency:50, pt:0.5}
  });
  s.addText(row.label, {
    x:LX + 0.14, y:y+0.02, w:LABEL_W - 0.18, h:ROW_H - 0.04,
    fontSize:9, bold:true,
    color: isBenign ? "4DD9B2" : "FF8080",
    fontFace:"Calibri", align:"left", valign:"middle"
  });

  // Data cells
  const keys = ["CT","HRCT","CECT","T1","T2","STIR","DWI"];
  keys.forEach((k, ci) => {
    const x = cx(ci);
    const cellText = row[k] || "";
    const hasStar  = cellText.includes("★");
    const colColor = modCols[ci].color;

    // Cell border
    s.addShape(pres.shapes.RECTANGLE, {
      x, y, w:COL_W, h:ROW_H,
      fill:{color:rowFill, transparency: hasStar ? 0 : 100},
      line:{color:"1E3A4E", pt:0.4}
    });

    // Highlighted cell background for ★
    if (hasStar) {
      s.addShape(pres.shapes.RECTANGLE, {
        x, y, w:COL_W, h:ROW_H,
        fill:{color:colColor, transparency:78},
        line:{color:colColor, transparency:55, pt:0.6}
      });
      // Top accent stripe
      s.addShape(pres.shapes.RECTANGLE, {
        x, y, w:COL_W, h:0.05,
        fill:{color:colColor, transparency:20},
        line:{color:colColor, transparency:20}
      });
    }

    // Text — strip ★ and render cleanly
    const cleanText = cellText.replace(/★/g, "").trim();
    const lines = cleanText.split("\n");
    const richArr = [];
    lines.forEach((line, li) => {
      const isLast = li === lines.length - 1;
      const isFirstLine = li === 0;
      richArr.push({
        text: line,
        options: {
          color: hasStar
            ? (isFirstLine ? C.white : "CCCCCC")
            : (isFirstLine ? "DDDDDD" : "AAAAAA"),
          bold: hasStar && isFirstLine,
          fontSize: isFirstLine ? (hasStar ? 9 : 8.5) : 8,
          breakLine: !isLast
        }
      });
    });
    // Add ★ badge if hallmark
    if (hasStar) {
      richArr.unshift({
        text: "★ ",
        options: { color:"FFD700", bold:true, fontSize:10, breakLine:false }
      });
    }

    s.addText(richArr, {
      x:x+0.06, y:y+0.04, w:COL_W-0.10, h:ROW_H-0.08,
      fontFace:"Calibri", valign:"middle", align:"left"
    });
  });

  // Row separator
  s.addShape(pres.shapes.RECTANGLE, {
    x:LX, y:y + ROW_H - 0.01, w:13.3 - LX, h:0.01,
    fill:{color:"1E3A4E"}, line:{color:"1E3A4E"}
  });
});

// ─── BOTTOM LEGEND BAR ───────────────────────────────────────────────────────
const LEG_Y = rowY(rows.length) + 0.03;
s.addShape(pres.shapes.RECTANGLE, {
  x:LX, y:LEG_Y, w:13.3 - LX, h:0.22,
  fill:{color:"0B1E35"}, line:{color:C.T2, pt:0.5}
});
s.addText(
  "★ = Pathognomonic / Most Diagnostic Feature     " +
  "IP = Inverted Papilloma  |  JNA = Juvenile Nasopharyngeal Angiofibroma  |  " +
  "SNUC = Sinonasal Undifferentiated Carcinoma  |  ENB = Esthesioneuroblastoma  |  " +
  "ITAC = Intestinal-type Adenocarcinoma  |  AdCC = Adenoid Cystic Ca.  |  " +
  "NHL = Non-Hodgkin Lymphoma  |  NKT = NK/T-cell Lymphoma  |  " +
  "PNTS = Perineural Tumour Spread  |  PPF = Pterygopalatine Fossa  |  " +
  "CE = Contrast Enhancement  |  ADC = Apparent Diffusion Coefficient",
  {
    x:LX + 0.1, y:LEG_Y + 0.02, w:13.0, h:0.18,
    fontSize:6.8, color:C.light, fontFace:"Calibri",
    italic:false, valign:"middle"
  }
);

// ─── WRITE ────────────────────────────────────────────────────────────────────
const OUT = "/home/daytona/workspace/sinonasal-pptx/Sinonasal_DDx_Imaging_Comparison.pptx";
pres.writeFile({ fileName: OUT }).then(() => {
  console.log("✅ Written: " + OUT);
}).catch(err => {
  console.error("❌", err);
  process.exit(1);
});

Running Command

cd /home/daytona/workspace/sinonasal-pptx && node ddx_comparison.js 2>&1

Zero warnings, clean build. Here is your file:

Sinonasal DDx Imaging Comparison
Presentation · PPTX

How it works

Rows = 17 diagnoses (8 benign + 9 malignant), Columns = 7 modalities (CT · HRCT · CECT · MRI T1 · T2 · STIR · DWI/ADC)

Color coding	Meaning
Left sidebar — green	Benign lesion
Left sidebar — red	Malignant lesion
Gold ★ + highlighted cell	Pathognomonic / most diagnostic sign for that lesion on that modality
Column header color	Each modality has its own color (teal CT, gold CECT, purple T1, blue T2, pink STIR, orange DWI)

At a glance — the ★ hallmarks:

Diagnosis	Starred modality	Why
Nasal Polyps	T2	Hyperintense (high water)
Inverted Papilloma	HRCT + T2	Focal hyperostosis; Cerebriform pattern
Osteoma	CT + HRCT	Dense ivory / ground-glass
Fibrous Dysplasia	CT + HRCT	Ground-glass matrix
JNA	CECT + T1/T2	Intense arterial CE; flow voids
SCC	CT + DWI	Bone destruction; low ADC
Adenocarcinoma	T2	Hyperintense mucin pools
AdCC	CECT + STIR	Perineural nerve enhancement
SNUC	CT/CECT + DWI	Central necrosis; very low ADC
ENB	T2	Peripheral intracranial cysts
Melanoma	T1 + T2 + STIR	T1↑ / T2↓ (paramagnetic melanin)
Lymphoma	CT + CECT + T2 + DWI	Hyperdense; T2 dark; homogeneous CE; restricted DWI
Chondrosarcoma	CT + HRCT + T2	Arc-ring Ca++; lobular T2 bright

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