• 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

Hemorrhage & Shock — Surgery 101

What Is Shock?

Types of Shock (The Big 4)

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

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

Cardiac output falls early; arterial pressure is maintained by sympathetic compensation until ~40% blood loss — then both collapse.

ATLS Classification of Hemorrhagic Shock

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.

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

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.

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)

General Examination + Thyroid Examination

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."

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.

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)

Clinical photo: Goitre presenting as a midline anterior neck swelling — note the mass moves with swallowing

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)

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

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)

Special Tests in Thyroid Examination

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

General Examination in a Thyroid Patient

In Hyperthyroidism (Graves' disease especially):

Classic triad of Graves' disease: (A) Bilateral exophthalmos with scleral show, (B) Pretibial myxedema on legs, (C,D) Thyroid acropathy (clubbing)

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

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."

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

Thyroid Cancer — Surgery 101

Overview: The Big Picture

Papillary → Follicular → Medullary → Anaplastic

The 4 Types at a Glance

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)

H&E: Papillary fronds with fibrovascular cores, Orphan Annie nuclei, psammoma bodies — the hallmarks of 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

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.

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!

H&E: Nested tumour cells with intercellular amyloid (pink acellular material) — classic for medullary carcinoma

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

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

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)

Treatment Summary

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

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