🧠 RADIOLOGICAL FEATURES OF SINONASAL TUMORS

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`);

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function img(idx) {
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// ─── Presentation ────────────────────────────────────────────────────────────
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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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    ["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"],
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// ══════════════════════════════════════════════════════════════
// SLIDE 3 — IMAGING STRATEGY
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// ══════════════════════════════════════════════════════════════
// SLIDE 4 — BONE PATTERNS
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    { 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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    ["MRI", "• T1: Low signal\n• T2: Hyperintense (high water content)\n• Enhancement: Peripheral rim ONLY (not solid)"],
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  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
// ══════════════════════════════════════════════════════════════
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  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: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.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:5.625, fill:{color:"F7F9FC"}, line:{color:"F7F9FC"} });
  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
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  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);
});

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);
});

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

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",
  },
];

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// ─── TITLE ───────────────────────────────────────────────────────────────────
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// ─── COLUMN HEADERS ──────────────────────────────────────────────────────────
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});

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

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});

// ─── ROWS ─────────────────────────────────────────────────────────────────────
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    fill:{color:"1E3A4E"}, line:{color:"1E3A4E"}
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// ─── BOTTOM LEGEND BAR ───────────────────────────────────────────────────────
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  "★ = 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",
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// ─── WRITE ────────────────────────────────────────────────────────────────────
const OUT = "/home/daytona/workspace/sinonasal-pptx/Sinonasal_DDx_Imaging_Comparison.pptx";
pres.writeFile({ fileName: OUT }).then(() => {
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}).catch(err => {
  console.error("❌", err);
  process.exit(1);
});