Neet imp pyqs .

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Got it - NEET PG important PYQs. One more quick question:

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Which subject or specialty do you want important NEET PG PYQs from?

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Any specific topic within Medicine, or all high-yield topics?

Here are high-yield NEET PG Important PYQs in Medicine (Internal Medicine) across all major topics. These are repeatedly asked questions based on previous NEET PG / INI-CET / USMLE-style patterns:

NEET PG - Medicine: High-Yield Important PYQs

🫀 CARDIOLOGY

Q1. A 55-year-old man presents with chest pain radiating to the jaw, diaphoresis, and ST elevation in leads II, III, aVF. Which artery is most likely occluded?

A) LAD B) RCA C) LCX D) Diagonal
✅ Answer: B) RCA - Inferior MI (II, III, aVF) = RCA territory

Q2. Drug of choice for Wolff-Parkinson-White (WPW) syndrome with AF:

A) Digoxin B) Verapamil C) Procainamide D) Adenosine
✅ Answer: C) Procainamide (Digoxin & Verapamil are contraindicated in WPW)

Q3. Opening snap in mitral stenosis - which is true?

OS is best heard at apex; short S2-OS interval = severe MS (high LA pressure)
✅ Key: Short S2-OS interval = Severe MS

Q4. Drug causing lupus-like syndrome most commonly:

A) Hydralazine B) Amiodarone C) Captopril D) Metoprolol
✅ Answer: A) Hydralazine (also Procainamide, Isoniazid)

Q5. Which murmur increases with Valsalva?

✅ HOCM (most murmurs decrease; HOCM & MVP increase with Valsalva)

🫁 RESPIRATORY / PULMONOLOGY

Q6. Gold standard for diagnosis of Pulmonary Embolism:

A) D-dimer B) CTPA C) V/Q scan D) Pulmonary angiography
✅ Answer: B) CTPA (Gold standard in clinical practice; pulmonary angiography is historical gold standard)

Q7. A patient with COPD has PaO2 = 55 mmHg, SpO2 = 88%. When is long-term O2 therapy (LTOT) indicated?

✅ PaO2 ≤ 55 mmHg OR SpO2 ≤ 88% (or PaO2 ≤ 59 with cor pulmonale/polycythemia)

Q8. Pancoast tumor - all are features EXCEPT:

Involves apex of lung, causes Horner's syndrome, C8-T1-T2 nerve involvement, rib erosion
✅ Key: Does NOT cause phrenic nerve palsy (that's a central/mediastinal tumor feature)

Q9. "Eggshell calcification" of lymph nodes is seen in:

✅ Silicosis (also Sarcoidosis rarely)

Q10. Drug of choice for Pneumocystis jirovecii pneumonia (PCP):

✅ Co-trimoxazole (TMP-SMX) - both treatment and prophylaxis

🧠 NEUROLOGY

Q11. A patient has UMN signs below T4 with loss of pain and temperature below T4, but preserved proprioception. Which syndrome?

✅ Brown-Sequard syndrome - ipsilateral motor loss + contralateral pain/temp loss

Q12. Charcot's triad is seen in:

A) Cholangitis B) Multiple Sclerosis C) Wernicke's D) Wilson's
✅ A) Cholangitis (fever, jaundice, RUQ pain); MS has Charcot's triad of Nystagmus + Intention tremor + Scanning speech

Q13. Vitamin deficiency causing subacute combined degeneration of spinal cord:

✅ Vitamin B12 deficiency - affects dorsal columns + lateral corticospinal tracts

Q14. Most common cause of meningitis in adults:

✅ Streptococcus pneumoniae

Q15. Argyll Robertson pupil: accommodates but does not react. Seen in:

✅ Neurosyphilis (also DM rarely)

🩸 HAEMATOLOGY

Q16. Hypersegmented neutrophils are seen in:

✅ Megaloblastic anemia (B12 / Folate deficiency)

Q17. PNH (Paroxysmal Nocturnal Hemoglobinuria) - diagnostic test:

✅ Flow cytometry (CD55/CD59 deficiency) - Ham's test is classical but outdated

Q18. "Tear drop cells (Dacrocytes)" are characteristic of:

✅ Myelofibrosis

Q19. Most common type of Hemophilia:

✅ Hemophilia A (Factor VIII deficiency); X-linked recessive

Q20. Drug of choice for CML:

✅ Imatinib (Gleevec) - BCR-ABL tyrosine kinase inhibitor; Philadelphia chromosome t(9;22)

🫘 NEPHROLOGY

Q21. Most common cause of nephrotic syndrome in adults:

✅ Membranous nephropathy (in adults); MCNS in children

Q22. "Onion skin" appearance of arterioles is seen in:

✅ Malignant hypertension

Q23. Renal tubular acidosis type 1 (distal) - which is NOT excreted?

✅ Cannot acidify urine below pH 5.5 - H+ secretion defect; causes hypokalemia + nephrocalcinosis

Q24. Drug of choice for renal TB:

✅ Standard ATT (HRZE regimen) for 6-9 months; same as pulmonary TB

Q25. Dialysis disequilibrium syndrome - cause:

✅ Rapid osmotic shifts causing cerebral edema during first dialysis session

🦠 INFECTIOUS DISEASES

Q26. Weil's disease is caused by:

✅ Leptospira (severe form with jaundice + renal failure + hemorrhage)

Q27. Rose spots on abdomen are seen in:

✅ Typhoid fever (Salmonella typhi)

Q28. "Maltese cross" appearance on peripheral smear:

✅ Babesiosis

Q29. Drug of choice for Falciparum malaria (uncomplicated):

✅ Artemisinin-based Combination Therapy (ACT) - e.g., Artesunate + Lumefantrine

Q30. Most sensitive test for H. pylori:

✅ Urea Breath Test (UBT) (post-treatment); Biopsy/CLO test for active diagnosis

🔬 ENDOCRINOLOGY

Q31. Chvostek's sign and Trousseau's sign are seen in:

✅ Hypocalcemia (tetany)

Q32. Commonest cause of Cushing's syndrome overall:

✅ Exogenous steroid use (Iatrogenic); Cushing's disease = pituitary ACTH-secreting adenoma

Q33. "Pretibial myxedema" is seen in:

✅ Graves' disease (hyperthyroidism, not hypothyroidism)

Q34. MEN 2A includes:

✅ Medullary thyroid carcinoma + Pheochromocytoma + Hyperparathyroidism (RET mutation)

Q35. Whipple's triad is seen in:

✅ Insulinoma (symptoms with hypoglycemia, low blood glucose, relief with glucose)

🦴 RHEUMATOLOGY

Q36. Anti-CCP antibodies are specific for:

✅ Rheumatoid Arthritis (most specific; RF is sensitive but less specific)

Q37. Butterfly rash + photosensitivity + ANA positive = diagnosis:

✅ SLE (anti-dsDNA + anti-Sm are most specific for SLE)

Q38. Drug causing gout by decreasing uric acid excretion:

✅ Low-dose Aspirin (high-dose aspirin is uricosuric)

Q39. "Bamboo spine" on X-ray:

✅ Ankylosing Spondylitis (HLA-B27 associated)

Q40. Drug of choice for acute gout attack:

✅ NSAIDs (Indomethacin) OR Colchicine

🫃 GASTROENTEROLOGY

Q41. "Lead pipe" appearance on barium enema:

✅ Ulcerative Colitis (loss of haustrations)

Q42. Skip lesions + transmural inflammation + cobblestone appearance:

✅ Crohn's Disease

Q43. Most common site of carcinoid tumor:

✅ Appendix (overall); Ileum (most common to cause carcinoid syndrome)

Q44. Child-Pugh score includes all EXCEPT:

Parameters: Bilirubin, Albumin, PT/INR, Ascites, Encephalopathy
✅ NOT AFP or ALT - those are not part of Child-Pugh

Q45. Drug of choice for Hepatic Encephalopathy:

✅ Lactulose + Rifaximin (reduces ammonia production)

💊 HIGH-YIELD PHARMACOLOGY IN MEDICINE

Drug	Key Point
Metformin	DOC in Type 2 DM; contraindicated in renal failure (GFR <30)
Digoxin toxicity	Yellow vision, bradycardia; treat with Digibind
Warfarin reversal	Vitamin K + Fresh Frozen Plasma (FFP)
Heparin overdose	Protamine sulfate
Lithium toxicity	Coarse tremor, polyuria, nephrogenic DI; narrow TI
Amiodarone side effects	Thyroid, pulmonary, hepatic, corneal deposits, photosensitivity

📊 QUICK HIGH-YIELD MNEMONICS

MUDPILES = Causes of high anion gap metabolic acidosis (Methanol, Uremia, DKA, Propylene glycol, INH/Iron, Lactic acidosis, Ethylene glycol, Salicylates)
AEIOU TIPS = Causes of coma
HACEK organisms = Infective endocarditis in culture-negative cases

These cover the most repeatedly tested areas in NEET PG Medicine. Want me to go deeper into any specific topic, create MCQs with explanations, or make a printable PDF/notes format?

Explain cardio 1

The first cardiology question was about Inferior MI and the RCA. Let me give you a full NEET PG-level explanation.

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inferior MI ST elevation leads II III aVF ECG RCA occlusion

A standard 12-lead electrocardiogram (ECG) with rhythm strips (V1, II, V5) showing an acute inferior ST-elevation myocardial infarction (STEMI) complicated by high-grade atrioventricular (AV) block. Significant ST-segment elevation is present in the inferior leads (II, III, and aVF), with the magnitude of elevation in lead III exceeding that in lead II, suggesting a right coronary artery (RCA) occlusion. Reciprocal ST-segment depression and T-wave inversion are visible in the high lateral leads (I, aVL) and anterior lead V2. The rhythm analysis reveals complete heart block (third-degree AV block) characterized by atrioventricular dissociation, with an atrial rate significantly faster than the ventricular escape rate (approximately 37 bpm). The QRS complexes are wide, and P waves do not maintain a fixed relationship with the ventricular activity. This visual findings are pathognomonic for an inferior wall MI with ischemia to the AV node, commonly associated with a proximal RCA lesion.

A 12-lead diagnostic electrocardiogram (ECG) tracing displaying classic signs of an inferior wall myocardial infarction (MI). The tracing exhibits significant convex-upwards ST-segment elevation (Pardee waves) and T-wave inversions in the inferior leads (II, III, and aVF). Notably, deep and wide pathological Q waves are present in these same leads, suggesting myocardial necrosis or a completed infarction sequence. Additionally, the rhythm strip demonstrates evidence of a second-degree atrioventricular (AV) block, characterized by a non-conducted P wave following a consistent PR interval pattern. Reciprocal ST-segment depression is visible in the lateral leads (I, aVL), a common finding in acute inferior ST-elevation myocardial infarction (STEMI). This visual provides critical educational evidence for diagnosing coronary artery occlusion, specifically involving the right coronary artery (RCA) or left circumflex artery, and illustrates the potential conduction system complications associated with inferior wall damage.

A 12-lead electrocardiogram (ECG) demonstrating signs of an acute inferior wall ST-elevation myocardial infarction (STEMI). The visual shows prominent, convex ST-segment elevation in the inferior leads: II, III, and aVF. Concurrent reciprocal ST-segment depression is visible in the lateral leads, specifically I and aVL, a hallmark finding that supports the diagnosis of acute inferior injury. The precordial leads (V1-V6) show a standard R-wave progression. The QRS complexes appear narrow, and the rhythm is regular. This diagnostic tracing is a critical educational example used to identify coronary artery occlusion, typically involving the right coronary artery (RCA). It is suitable for medical students and clinicians learning to distinguish between different territorial patterns of myocardial infarction and understand the clinical significance of reciprocal changes in emergency cardiology.

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Here is a complete NEET PG-level explanation of Cardiology Q1 - Inferior MI & RCA Occlusion:

🫀 NEET PG Cardiology Q1 - Full Explanation

The Question Revisited

A 55-year-old man has chest pain radiating to jaw, diaphoresis, and ST elevation in leads II, III, aVF. Which artery is occluded? Answer: RCA (Right Coronary Artery)

STEP 1 - Understand Coronary Artery Territories

This is the single most important concept in ECG-based MI questions.

Coronary Artery	Wall of Heart Supplied	ECG Leads Affected
LAD (Left Anterior Descending)	Anterior wall of LV, anterior septum, apex	V1, V2, V3, V4
RCA (Right Coronary Artery)	Inferior wall of LV, posterior septum, RV free wall	II, III, aVF
LCX (Left Circumflex)	Lateral wall of LV	I, aVL, V5, V6

Memory trick: "RCA = Right side = Inferior leads (II, III, aVF)" Think: RCA runs in the right atrioventricular groove and wraps inferiorly.

Frequency of involvement (from Robbins Pathology):

LAD = 40-50% of all MIs (most common)
RCA = 30-40%
LCX = 15-20%

STEP 2 - How to Identify Inferior MI on ECG

Classic ECG findings of Inferior STEMI (RCA occlusion):

✅ ST Elevation in II, III, aVF

Elevation in lead III > lead II = strongly suggests RCA (not LCX)
Elevation in lead II ≥ III = suggests LCX

✅ Reciprocal ST Depression in I and aVL

This is a mirror image of the inferior elevation
Reciprocal changes confirm true STEMI (not pericarditis, which has no reciprocal depression)

Here is a real ECG showing this exact pattern:

Inferior MI ECG from RCA occlusion - ST elevation in II, III, aVF with reciprocal depression in I and aVL

ECG showing complete heart block complicating inferior MI - another classic RCA complication

STEP 3 - The Key Differentiator: Lead III vs Lead II

Finding	Suggests
ST elevation III > II	RCA occlusion (proximal)
ST elevation II ≥ III	LCX occlusion
ST elevation in V5, V6 also	LCX (lateral extension)
ST elevation in V1 (right precordial)	Right Ventricular MI (proximal RCA)

Tintinalli's Emergency Medicine confirms: "ST elevation in lead III greater than in lead II plus ST depression in lead I and aVL = 100% RCA occlusion"

STEP 4 - Critical Complication: Right Ventricular Infarction (RVI)

This is NEET PG gold - proximal RCA occlusion also infarcts the RV.

How to detect RVI:

Do right-sided ECG leads - look for ST elevation in V4R
V4R elevation >1 mm = RVI confirmed

Why it matters clinically:

Feature	RVI
JVP	Raised (RV can't pump forward)
BP	Low (hypotension)
Lungs	Clear (not left heart failure)
Kussmaul's sign	Positive

CRITICAL management point for NEET PG:

AVOID nitrates and diuretics in RVI - they reduce preload and can cause profound hypotension. Give IV fluids instead to maintain RV filling.

STEP 5 - AV Node Involvement (Another RCA Complication)

The AV node is supplied by the RCA in 90% of people (right-dominant circulation).

So inferior MI (RCA) can cause:

1st degree AV block
2nd degree AV block (Mobitz type 1 / Wenckebach)
Complete (3rd degree) AV block - seen as slow escape rhythm

The ECG image above actually shows an inferior STEMI complicated by complete heart block - a classic NEET PG teaching case.

Treatment: Atropine first (AV block is usually transient in inferior MI); temporary pacing if needed.

STEP 6 - Inferior MI vs Posterior MI

Posterior MI (supplied by RCA's posterior descending branch):

No direct ST elevation on standard 12-lead
Look for: ST depression + tall R waves in V1-V3 (mirror image)
Confirm with posterior leads (V7, V8, V9) - ST elevation there confirms it

STEP 7 - Full Summary Table

Feature	Detail
Artery occluded	RCA
ECG leads	II, III, aVF (inferior leads)
Reciprocal changes	I, aVL (depression)
RCA vs LCX clue	III > II = RCA; II > III = LCX
Complication 1	RV infarction - avoid nitrates, give fluids
Complication 2	AV block - RCA supplies AV node
Complication 3	Bradycardia - sinus node also supplied by RCA
Key right-sided lead	V4R for RV infarction

High-Yield NEET PG One-Liners for This Topic

ST elevation II, III, aVF = Inferior MI = RCA
III > II = RCA; II > III = LCX
Reciprocal depression in I and aVL = confirms inferior STEMI
RVI = avoid nitrates + diuretics, give IV fluids
V4R elevation = right ventricular MI
AV block in inferior MI = RCA supplies AV node
Wenckebach (Mobitz 1) = common in inferior MI; Mobitz 2 = more common in anterior MI (LAD)

Sources: Tintinalli's Emergency Medicine, p. 381 | Robbins & Cotran Pathologic Basis of Disease, p. 12.11

Want me to explain Cardiology Q2 (WPW syndrome + AF) next, or any concept here in more depth?

Pcp doc n prophylaxis

PCP (Pneumocystis jirovecii Pneumonia) - DOC is Co-trimoxazole (TMP-SMX) for both treatment and prophylaxis. Let me give you the full NEET PG breakdown.

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Here is the complete NEET PG-level breakdown of PCP - Drug of Choice and Prophylaxis:

🦠 PCP (Pneumocystis jirovecii Pneumonia) - Complete NEET PG Guide

Quick Recall

DOC for Treatment = TMP-SMX (Co-trimoxazole) DOC for Prophylaxis = TMP-SMX (Co-trimoxazole) Same drug - both treatment AND prophylaxis!

PART 1 - TREATMENT

🥇 First-Line: TMP-SMX (Trimethoprim-Sulfamethoxazole / Co-trimoxazole)

Parameter	Detail
Drug	TMP-SMX (Co-trimoxazole)
Route	Oral (mild-moderate) or IV (severe)
Duration	21 days
Mechanism	TMP inhibits DHFR; SMX inhibits DHPS → blocks folate synthesis in Pneumocystis

⚡ Adjunctive Corticosteroids (NEET PG HIGH YIELD)

This is a very commonly tested point:

Add Prednisolone/Prednisone when PaO2 < 70 mmHg (room air) OR A-a gradient > 35 mmHg

Dose: Prednisolone 40 mg BD x 5 days → 40 mg OD x 5 days → 20 mg OD x 11 days
Start within 72 hours of starting TMP-SMX
Why? Dying Pneumocystis organisms cause an inflammatory surge → steroids dampen this
Failure to add steroids in severe PCP = increased mortality

🔄 Alternative Regimens (When TMP-SMX Not Tolerated)

This is the most tested "alternative" question in NEET PG:

Severity	Alternative Drug	Notes
Mild-Moderate	Dapsone + TMP	Oral; check G6PD before dapsone
Mild-Moderate	Atovaquone	Oral suspension; better tolerated
Mild-Moderate	Clindamycin + Primaquine	Check G6PD before primaquine
Severe	IV Pentamidine (4 mg/kg/day x 21 days)	Reserved for TMP-SMX intolerance
Salvage (failed 1st line)	Clindamycin + Primaquine	Preferred over pentamidine as salvage

Pentamidine side effects (NEET PG gold): Hypoglycemia (early - beta cell stimulation) → Hyperglycemia (late - beta cell destruction), Pancreatitis, Nephrotoxicity, Hypotension, Torsades de pointes, Hypocalcemia, Hypokalemia

G6PD check mandatory before Dapsone and Primaquine (both cause hemolysis in G6PD deficiency)

PART 2 - PROPHYLAXIS

When to Start Prophylaxis (NEET PG MUST KNOW)

Primary Prophylaxis (before first episode):

Indication	Threshold
HIV patients	CD4 count < 200 cells/µL OR CD4% < 14%
CD4 200-250	Give if CD4 monitoring not possible every 3 months
Non-HIV immunosuppressed	Steroids > 20 mg/day prednisolone for > 1 month; organ transplant; haematological malignancy

Secondary Prophylaxis (after completing treatment):

All HIV patients after a PCP episode must continue prophylaxis

When to STOP Prophylaxis

Type	Criteria to Stop
Primary	CD4 rises to > 200 cells/µL for ≥ 3 months on ART
Secondary	CD4 > 200 cells/µL for ≥ 3 months (or CD4 100-200 with undetectable viral load for ≥ 3-6 months)

🥇 Prophylaxis Regimens (Priority Order)

Priority	Drug	Dose	Notes
1st line	TMP-SMX (Co-trimoxazole)	1 DS tab daily OR 1 SS tab daily	Also protects against Toxoplasmosis
2nd line	Dapsone	100 mg/day (or 50 mg BD)	Check G6PD
2nd line	Dapsone + Pyrimethamine + Leucovorin	Dapsone 50 mg/day + Pyrimethamine 50 mg/week + Leucovorin 25 mg/week	Also covers Toxo
2nd line	Atovaquone	1500 mg/day	Expensive but well tolerated
3rd line	Aerosolized Pentamidine	300 mg monthly via nebulizer	Least preferred

Aerosolized pentamidine disadvantages:

Does NOT cover extrapulmonary Pneumocystis

No protection against Toxoplasmosis

Risk of pneumothorax

More breakthrough infections at CD4 < 100

PART 3 - DIAGNOSIS (Bonus High-Yield Points)

Test	Details
Gold standard	BAL (Bronchoalveolar Lavage) + GMS stain or DFA
Stains used	GMS (Gomori Methenamine Silver) - shows cyst wall; DFA (Direct Fluorescent Antibody) - most sensitive
Serum marker	Beta-D-glucan elevated (not specific, but supports diagnosis)
CXR	Bilateral ground-glass opacities (butterfly/bat-wing pattern)
HRCT	Ground-glass opacities, often perihilar
LDH	Elevated LDH = poor prognosis marker

PART 4 - COMPLETE ONE-LINER SUMMARY TABLE

Question	Answer
DOC treatment PCP	TMP-SMX (Co-trimoxazole) x 21 days
DOC prophylaxis PCP	TMP-SMX (Co-trimoxazole)
When to start prophylaxis	CD4 < 200 cells/µL
Adjunctive therapy severe PCP	Prednisolone (if PaO2 < 70 mmHg)
Alternative if TMP-SMX intolerant (mild-mod)	Atovaquone or Clindamycin + Primaquine
Alternative if TMP-SMX intolerant (severe)	IV Pentamidine
Salvage therapy	Clindamycin + Primaquine
Pentamidine prophylaxis dose/route	300 mg monthly - nebulized
Gold standard diagnosis	BAL + GMS stain
When to stop primary prophylaxis	CD4 > 200 for ≥ 3 months on ART
G6PD check needed before	Dapsone, Primaquine
TMP-SMX also covers	Toxoplasma gondii (extra benefit)

Sources: Fishman's Pulmonary Diseases and Disorders, p. 2396 | Murray & Nadel's Textbook of Respiratory Medicine | Goodman & Gilman's Pharmacological Basis of Therapeutics

Want me to continue with the next question (WPW + AF) or explain any part of PCP in more detail?

Opportunistic fungal infections

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