• Always know your patients before rounds — vitals, overnight events, pending investigations, drain outputs
• Carry a small notebook or use your phone for patient lists
• Learn to present concisely: "Mr. X, Day 2 post-op lap chole, afebrile, vitals stable, tolerating diet, drains nil, plan for discharge"

• Arrive early, scrub properly (watch a scrub technique video if you haven't)
• Stand where you don't block the light, and don't touch anything blue (sterile field)
• If you're unsure whether something is sterile — assume it's not
• Ask questions between cases, not during critical steps

• Surgical knot tying (start practicing!)
• Basic instruments: scalpel, Kocher, Allis, retractors, needle holders
• Surgical site infection (SSI) prevention principles
• Pre-op, intra-op, and post-op roles

• Be enthusiastic and proactive — volunteer to help with dressings, sutures, IV lines
• Residents remember students who show up early and stay engaged
• It's okay not to know — it's not okay not to try

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Hemorrhage & Shock — Surgery 101

What Is Shock?

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Types of Shock (The Big 4)

In surgery, hypovolemic (hemorrhagic) shock is what you'll encounter most — especially in trauma and post-op patients.

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Hemorrhagic Shock: The Physiology

1. Arteriolar vasoconstriction → ↑ Total Peripheral Resistance
2. Venous constriction → maintains venous return
3. Tachycardia → HR can rise to 160–180 bpm

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ATLS Classification of Hemorrhagic Shock

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3 Stages of Shock (Harrison's)

1. Compensated (preshock): Body compensates — HR rises, SVR rises, BP maintained. Mild lactate elevation. Organs still okay. Reversible if caught here.
2. Decompensated (true shock): Compensatory mechanisms overwhelmed. Hypotension, organ dysfunction (↑ creatinine, altered consciousness, oliguria). Still reversible with aggressive treatment.
3. Irreversible shock: Permanent organ damage. Multiorgan failure. Even with treatment, death is likely.

⚠️ The goal is to catch shock at Stage 1 or 2 — never let it reach Stage 3.

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Progressive Deterioration in Untreated Shock

• ↓ perfusion → ischemic tissues → release of histamine, serotonin, cytokines
• Capillary permeability ↑ → fluid leaks into interstitium → further ↓ volume
• Lactic/carbonic acid → blood "sludging" in microvasculature → microthrombi
• CNS ischemia → vasomotor centre fails → complete cardiovascular collapse

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Management: The Surgical Approach

Immediate steps (think ABCDE + hemorrhage control)

1. Stop the bleeding — pressure, tourniquet, surgical control. "Stop the bleeding first" is the golden rule.
2. Two large-bore IV lines (antecubital, 16G or larger)
3. Send bloods: FBC, U&E, coagulation, cross-match, ABG (lactate!)
4. Fluid resuscitation:
   • Class I–II: Crystalloid (Normal saline or Lactated Ringer's)
   • Class III–IV: Blood products. Rule of thumb — start pRBCs once crystalloids exceed 30 mL/kg (~2L)
5. Target MAP ≥ 60–65 mmHg
6. Monitor urine output (catheterise) — aim >0.5 mL/kg/h
7. Warm the patient — hypothermia worsens coagulopathy

The Lethal Triad (avoid at all costs in trauma)

Hypothermia + Acidosis + Coagulopathy — each worsens the others. Breaking this cycle is the core of damage control surgery.

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Quick Summary Card

Shock = ↓ O₂ delivery to tissues
Hemorrhagic shock = most common in surgery
Signs: tachycardia > hypotension (BP is a late sign!)
ATLS Class I→IV based on blood loss %
3 stages: Compensated → Decompensated → Irreversible
Treatment: Stop bleeding + Fluids + Blood products + Monitor UO
Avoid: Lethal triad (hypothermia + acidosis + coagulopathy)

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General Examination + Thyroid Examination

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PART 1: General Examination

The 10 Components of General Examination

Surgery tip: Always add vitals (BP, HR, RR, SpO₂, temp) and urine output in surgical patients.

Presenting General Examination

"The patient is conscious, oriented, and cooperative. She is moderately built and nourished. She has no pallor, jaundice, cyanosis, or clubbing. There is no significant lymphadenopathy or pedal oedema."

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PART 2: Thyroid Examination

The Key Rule Before You Start

Ask the patient to swallow while you watch the neck from across the room. A thyroid swelling moves up with swallowing — this distinguishes it from other neck lumps. A thyroglossal cyst moves up with tongue protrusion.

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Step-by-Step Thyroid Examination

1. INSPECTION (from front, patient seated)

• Inspect the anterior neck at rest
• Ask patient to swallow (offer a glass of water) — does the swelling move?
• Note:
  • Size — localised or diffuse?
  • Shape — single nodule / multinodular / diffuse?
  • Symmetry — unilateral or bilateral?
  • Surface — smooth / irregular / nodular
  • Overlying skin — erythema, dilated veins, scar (previous surgery)
  • Visible pulsation — seen in vascular goitres (hyperthyroidism)

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2. PALPATION (stand behind the patient — the surgical way)

• Site — which lobe? Isthmus?
• Size — approximate cm
• Shape — diffuse or nodular
• Surface — smooth / irregular
• Consistency — soft / firm / hard / rubbery
  • Soft → colloid goitre
  • Rubbery/firm → Hashimoto's
  • Hard/stony → malignancy or Riedel's
• Tenderness — tender in thyroiditis; non-tender in most others
• Mobility — mobile in benign; fixed/tethered → malignancy
• Fixity to skin — pinch skin over the swelling
• Fluctuation — cysts may fluctuate
• Ask patient to swallow again — confirm movement

• Cervical lymph nodes — central compartment (level VI), lateral (levels II–IV) — for malignancy
• Trachea — is it central or deviated? (large goitre can deviate it)
• Berry's sign — absence of carotid pulsation on the side of a malignant thyroid (carotid encasement)

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3. PERCUSSION

• Percuss over the upper sternum (manubrium) from top downward
• Dullness on sternal percussion → retrosternal extension of goitre
• This is often missed but is a surgical red flag

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4. AUSCULTATION

• Place the bell of the stethoscope over each lobe
• Listen for a bruit (continuous swooshing murmur) → indicates increased vascularity
• Bruit is a hallmark of Graves' disease (active hyperthyroidism)
• Ask the patient to hold their breath during auscultation (to eliminate tracheal breath sounds)

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Special Tests in Thyroid Examination

Pemberton's sign is one of those dramatic signs you'll love showing on rounds.

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General Examination in a Thyroid Patient

In Hyperthyroidism (Graves' disease especially):

In Hypothyroidism (Hashimoto's, post-surgery):

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How to Present Thyroid Examination

"On inspection, there is a diffuse smooth swelling in the anterior neck involving both lobes of the thyroid, which moves up with deglutition. On palpation from behind, the gland is diffusely enlarged, smooth, non-tender, firm, mobile, not fixed to skin or deep structures. Trachea is central. No cervical lymphadenopathy is palpable. On percussion, there is no retrosternal dullness. On auscultation, a bruit is present over both lobes. General examination reveals fine tremors, warm moist hands, and lid lag — consistent with hyperthyroidism."

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Quick Summary Card

Thyroid swelling moves UP with swallowing ← key differentiator
Palpate from BEHIND (surgeon's approach)
Hard + fixed + LN → think malignancy
Bruit → Graves' disease (hyperthyroid)
Pemberton's sign → retrosternal extension
Tremor + tachycardia + exophthalmos → Graves' triad
Slow reflexes + puffy face + bradycardia → Hypothyroid

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Thyroid Cancer — Surgery 101

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Overview: The Big Picture

Papillary → Follicular → Medullary → Anaplastic

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The 4 Types at a Glance

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1. Papillary Thyroid Carcinoma (PTC)

Key Histological Features (what the pathologist sees)

• Papillary architecture — finger-like projections with fibrovascular core
• "Orphan Annie eye" nuclei — optically clear, empty-looking nuclei
• Nuclear grooves and pseudo-inclusions
• Psammoma bodies — concentrically calcified concentric rings (almost pathognomonic for PTC)

Key point: The nuclear features alone are diagnostic even WITHOUT papillary architecture.

Clinical Features

• Painless neck mass (within thyroid OR as a cervical lymph node metastasis)
• More common in women, peaks 30–50 years
• Can be multifocal within the thyroid
• FNAC (fine needle aspiration cytology) is usually diagnostic preoperatively

Spread & Prognosis

• Spreads via lymphatics → cervical lymph nodes (up to 50% of cases)
• Isolated nodal metastases do NOT worsen prognosis significantly in younger patients
• Rare haematogenous spread (lungs most common)
• 10-year survival >95% — one of the best prognoses of any cancer

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2. Follicular Thyroid Carcinoma

Key Histological Features

• Uniform follicular cells resembling normal thyroid
• Diagnosis requires CAPSULAR ± VASCULAR INVASION — cannot be diagnosed on FNAC alone (this is why follicular lesions on FNAC need surgery)
• Distinguished from follicular adenoma only by invasion on histology

Clinical Features

• Presents as a solitary cold nodule
• More common in women, peak age 40–60 years

Spread & Prognosis

• Spreads via blood → lungs, bone, liver (haematogenous)
• Regional LN metastasis is uncommon
• Minimally invasive: <10% mortality at 10 years
• Widely invasive: ~50% mortality at 10 years

Surgeon's pearl: FNAC says "follicular lesion" → operate, because you cannot distinguish adenoma from carcinoma without the surgical specimen.

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3. Medullary Thyroid Carcinoma (MTC)

Epidemiology

• 70% sporadic (solitary nodule, adults, peak 40s–50s)
• 30% familial — associated with MEN2A or MEN2B or Familial MTC
  • All familial cases carry germline RET mutations
  • Familial cases: bilateral, multifocal, younger patients

MEN Associations (must know)

Any patient with MTC should be screened for phaeochromocytoma before surgery — operating on an undiagnosed phaco can kill the patient.

Key Histological Feature

• Polygonal to spindle cells in nests/trabeculae
• Amyloid deposits in stroma (derived from calcitonin polypeptides) — characteristic!

Tumour Marker

• Calcitonin — used for diagnosis AND follow-up (if calcitonin rises post-op → recurrence)
• Some also secrete serotonin, ACTH, VIP

Treatment

• Surgery (total thyroidectomy + central neck dissection)
• NOT radioiodine-sensitive
• Targeted therapy (vandetanib, cabozantinib) for metastatic disease

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4. Anaplastic (Undifferentiated) Thyroid Carcinoma

Key Points

• Arises de novo or by dedifferentiation of a pre-existing PTC or follicular carcinoma (TP53 loss is the key step)
• Mean age at presentation: 65 years
• Up to 25% have a prior history of well-differentiated thyroid carcinoma

Clinical Presentation

• Rapidly enlarging, bulky, hard neck mass — this is the hallmark
• Symptoms of compression: dysphagia, dysphonia (hoarseness), dyspnea, stridor
• Most are already locally invasive or metastatic (lungs) at presentation

Prognosis

• Death in <1 year in most cases
• NOT radioiodine-sensitive
• Surgery rarely curative — palliative approach with external beam RT ± targeted therapy

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Investigations for a Thyroid Nodule (Work-up)

Step 1: TSH (is it hyper/hypo/euthyroid?)
Step 2: Ultrasound (USS) — size, echogenicity, margins, calcifications, LN
Step 3: FNAC (fine needle aspiration cytology) → Bethesda system reporting
Step 4: If follicular lesion on FNAC → surgery (hemithyroidectomy)
Step 5: CT neck/chest if large, substernal, or suspected malignancy
Step 6: Calcitonin if MTC suspected
Step 7: Thyroglobulin post-thyroidectomy for follow-up

The Bethesda System (FNAC reporting for thyroid)

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Treatment Summary

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Red Flags on History/Exam Suggesting Malignancy

✗ Hard, firm, fixed, non-tender thyroid nodule
✗ Rapid growth
✗ Hoarseness (recurrent laryngeal nerve invasion)
✗ Dysphagia (oesophageal invasion)
✗ Cervical lymphadenopathy
✗ History of neck radiation
✗ Age extremes (<20 or >60)
✗ Male sex (more likely malignant than in females)
✗ Family history of MTC or MEN

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Quick Summary Card

4 types: Papillary (85%) > Follicular > Medullary > Anaplastic
PTC: Orphan Annie nuclei + psammoma bodies, lymphatic spread, excellent prognosis
Follicular: Cannot diagnose by FNAC alone, haematogenous spread
Medullary: C cells, calcitonin marker, amyloid on histo, RET mutation, MEN2
Anaplastic: Rapidly enlarging hard mass, TP53 loss, uniformly lethal
Work-up: USS → FNAC (Bethesda) → Surgery
Radioiodine works: PTC and FTC only

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Surgery in the OT — 101 for Students

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PART 1: Pre-operative Phase ("Before the Cut")

Pre-operative Assessment

• Full history: presenting complaint, comorbidities (DM, HTN, cardiac, renal, bleeding disorders), medications, allergies, previous surgeries/anaesthesia
• Drug history is critical: stop anticoagulants (warfarin 5 days before, NOACs 24–48 hrs), stop metformin (24–48 hrs before, risk of lactic acidosis), continue antihypertensives and cardiac drugs
• Family history of anaesthetic problems → ask about malignant hyperthermia

Higher ASA = higher anaesthetic and operative risk. Surgeons quote this when consenting patients.

Consent

• Must be informed, voluntary, and competent
• Surgeon (not nurse/student) must consent the patient
• Explain: procedure, benefits, risks (common AND serious), alternatives, what happens if not done
• Document: specific risks relevant to that operation (e.g., "RLN injury and voice change" for thyroidectomy)

Fasting (NBM — Nil By Mouth)

Pre-operative Marking

• Surgeon marks the correct site and side with a permanent marker
• Done in the ward, with patient awake and confirming
• Prevents wrong-site surgery (a "never event")

WHO Surgical Safety Checklist

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PART 2: Anaesthesia Basics

Types of Anaesthesia

Induction of GA — RSI (Rapid Sequence Induction)

1. Pre-oxygenate
2. Cricoid pressure (Sellick's manoeuvre)
3. IV induction agent (propofol or thiopentone)
4. Fast-acting muscle relaxant (suxamethonium)
5. Intubate
6. Confirm tube placement (EtCO₂, bilateral air entry)

The Triad of Anaesthesia

Hypnosis (unconscious) + Analgesia (pain-free) + Muscle relaxation (still)

Monitoring During Surgery (Minimum Standard)

• ECG
• SpO₂ (pulse oximetry)
• NIBP / IBP (non-invasive / invasive BP)
• EtCO₂ (end-tidal CO₂ — confirms intubation, detects problems)
• Temperature
• Urine output (catheter)

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PART 3: Intra-operative Phase ("In the OT")

Sterile Field — Golden Rules for Students

• Anything blue/draped = sterile → don't touch
• If in doubt — it's not sterile
• Face the sterile field at all times
• Stay away from the scrub nurse's trolley
• Don't reach over the sterile field
• If you contaminate yourself → say so immediately

Surgical Scrub Technique

• Nails first (brush)
• Hands → wrists → forearms → elbows
• Keep hands above elbows at all times (water drains away from hands)
• Air dry, then gown and glove aseptically

Gowning and Gloving

• Open gown technique (scrub nurse assists)
• Closed gloving (hands stay inside gown cuffs until gloves are on) — preferred in scrubbing in for the first time
• Once gowned: keep hands above waist, below shoulders, in front of body — this is the sterile zone

Common Surgical Instruments (Know These!)

Diathermy (Electrocautery)

• Monopolar: current passes through patient's body → return plate on thigh; used for cutting and coagulation; NOT safe near pacemakers/implants
• Bipolar: current passes only between two tips of forceps; used for delicate/precision work (e.g., neurosurgery, vascular)
• Cutting mode: continuous current → cuts cleanly
• Coagulation mode: pulsed current → seals vessels

Sutures — What You Must Know

• Deep layers / bowel anastomosis / fascia → Absorbable (Vicryl, PDS)
• Skin → Non-absorbable removed after healing (Prolene, Nylon) OR absorbable Monocryl (subcuticular, no removal needed)
• Vascular anastomosis → Prolene (non-absorbable, permanent)
• Quick ties / ligatures → Silk, Vicryl

Surgical Knots

• Square knot (reef knot) — standard, most used
• Surgeon's knot — first throw is double, more secure
• Rule of 3: minimum 3 throws for any knot to be secure

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PART 4: Post-operative Phase ("After the Cut")

Immediate Recovery (PACU — Post-anaesthesia Care Unit)

• Awake, oriented, following commands
• Stable vitals
• Pain controlled
• No excessive bleeding from wound/drains

Post-operative Orders (What the Surgeon Writes)

1. Vitals: every 15 min x 4, then hourly x 4, then 4-hourly
2. IV fluids: type, rate
3. Medications: analgesics, antibiotics, antiemetics, DVT prophylaxis
4. NBM or diet order (when to start feeding)
5. Drain: monitor output, when to remove
6. Catheter: monitor urine output (>0.5 mL/kg/hr)
7. Wound: dressing instructions
8. Special orders: blood glucose monitoring, O₂, positioning

Post-operative Complications — "The 5 Ws"

Early Mobilisation

• Start Day 0 or 1 post-op
• Reduces: atelectasis, DVT, ileus, pressure sores, hospital stay
• DVT prophylaxis: TED stockings + LMWH (e.g., enoxaparin 40 mg SC OD) + early mobilisation

Surgical Site Infection (SSI) Prevention

• Pre-op antibiotics: within 60 minutes before skin incision (timing is critical)
• Maintain normothermia (warm patient intraoperatively)
• Maintain normal glucose (hyperglycaemia impairs wound healing)
• Antiseptic skin preparation (chlorhexidine preferred over povidone iodine)
• Sterile technique throughout

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PART 5: Surgical Positions (Know These for Theatre)

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Quick Summary Card

Pre-op:   History + Ix → ASA grading → Consent → NBM 2-4-6 → Mark site
In OT:    WHO checklist → Anaesthesia triad → Sterile field → Instruments
Sutures:  Absorbable (deep) vs Non-absorbable (skin/vascular)
Post-op:  Monitor vitals/drains/UO → 5 Ws for fever → Mobilise early
Antibiotics: Give WITHIN 60 mins before incision
DVT:      TED stockings + LMWH + mobilise

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• "Basic surgery 101" (introductory guide — maybe you just meant that?)
• A specific topic like "basic surgical skills" (scrubbing, knots, sutures, drains)
• A numbered list of something specific (e.g., "top 10 things a surgery student must know")
• Something from your posting today you want to prep for?

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Thyroid Cancer — Quick Recap

The 4 Types: "People Fear My Anger"

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Key Facts by Type

• BRAF V600E mutation (up to 80%)
• Diagnosis by FNAC: nuclear grooves, pseudo-inclusions, psammoma bodies
• Lymph node mets don't significantly worsen prognosis in young patients
• Treatment: total thyroidectomy ± radioiodine (RAI)

• More common in iodine-deficient areas
• Diagnosis requires surgical specimen (capsular/vascular invasion) — FNAC only says "follicular lesion" → operate
• PAX8/PPARG fusion; MET mutations
• Treatment: total thyroidectomy + RAI

• 70% sporadic, 30% familial (germline RET mutation)
• MEN2A: MTC + Phaeochromocytoma + Hyperparathyroidism
• MEN2B: MTC + Phaeochromocytoma + Mucosal neuromas
• Marker: Calcitonin (diagnosis + follow-up)
• NOT RAI-sensitive → surgery + central neck dissection
• Screen for phaeochromocytoma before surgery

• TP53 loss → dedifferentiation from PTC/follicular
• Rapid growth, dysphagia, hoarseness, stridor
• Death usually within 1 year
• NOT RAI-sensitive; mainly palliative

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Work-up of a Thyroid Nodule

TSH → USS → FNAC (Bethesda I–VI) → Surgery if needed

• I: Non-diagnostic → repeat
• II: Benign → observe
• III: AUS → repeat/molecular testing
• IV: Follicular neoplasm → hemithyroidectomy
• V: Suspicious → surgery
• VI: Malignant → surgery

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Red Flags for Malignancy

Hard + fixed nodule | Rapid growth | Hoarseness
Cervical LN | Neck radiation history | Male sex
Age <20 or >60 | Family history of MTC/MEN

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Post-op Monitoring

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Thyroid Cancer — Comprehensive Comparison Table

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Key Memory Hooks

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The One Table to Rule Them All (Ultra-condensed)

         Papillary    Follicular    Medullary    Anaplastic
Origin:  Follicular   Follicular    C cells      Follicular
Spread:  Lymph        Blood         Both         Local+Blood
Marker:  Tg           Tg            Calcitonin   None
RAI:     Yes          Yes           NO           NO
Survive: Excellent    Good          Moderate     Lethal
Mutate:  BRAF         RAS/PAX8      RET          TP53

Dr. Rashide's Questions — Answered

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Q1. Anaplastic Thyroid Carcinoma vs Primary Thyroid Lymphoma

Surgeon's pearl: If you see a rapidly enlarging thyroid mass in an elderly woman with Hashimoto's — think lymphoma first. It's treatable. Mistaking it for anaplastic and doing aggressive surgery is harmful.

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Q2. Follicular vs Papillary Thyroid Carcinoma

Key distinction: PTC is diagnosed by nuclear features on FNAC. FTC can only be diagnosed on surgical histology by finding capsular or vascular invasion. This is why all "follicular lesions" on FNAC go to the theatre.

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Q3. Medullary Thyroid Carcinoma — Sporadic vs Familial

High-yield: In any MTC patient — screen for phaeochromocytoma first. Operating on an undiagnosed phaeochromocytoma can precipitate a fatal hypertensive crisis on the table.

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Q4. FNAC vs Tru-cut (Core Needle Biopsy)

When to use which in thyroid:

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Q5. Prognosis and Tumour Markers

Notes on markers:

• Thyroglobulin — only useful POST-total thyroidectomy. A rising Tg = recurrence of PTC or FTC. Useless if thyroid tissue remains.
• Calcitonin — used pre-op (diagnosis) AND post-op (surveillance). Undetectable calcitonin post-operatively = cure. Rising calcitonin = recurrence.
• CEA — elevated in MTC alongside calcitonin; rising CEA with falling calcitonin = poorly differentiated MTC (worse prognosis).
• Anaplastic — no useful serum marker; follow with CT imaging.
• Lymphoma — LDH reflects tumour burden; not thyroid-specific.

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Summary Cheat Sheet for Dr. Rashide's Rounds

Anaplastic vs Lymphoma:
  Both = rapid hard mass in elderly
  Lymphoma → Hashimoto's background, B symptoms, CD20+, CURABLE with R-CHOP
  Anaplastic → prior thyroid CA, TP53, CK+, always fatal

Papillary vs Follicular:
  PTC → FNAC works, lymphatic spread, psammoma bodies, BRAF
  FTC → FNAC can't diagnose, blood spread, needs capsular invasion, RAS/PAX8

Medullary Sporadic vs Familial:
  Sporadic → unilateral, somatic RET, adults
  Familial → bilateral/multifocal, germline RET, younger, MEN2 → SCREEN FAMILY

FNAC vs Tru-cut:
  FNAC = cells only; good for PTC, first-line
  Tru-cut = tissue architecture; needed for lymphoma, anaplastic, follicular adenoma vs CA

Markers:
  PTC/FTC → Thyroglobulin
  MTC → Calcitonin + CEA
  Anaplastic → None
  Lymphoma → LDH, Beta-2 microglobulin