Need an important repeatedly asked MCQ from nephrology chapter in medicine for undergraduate final year mbbs
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important repeated MCQ nephrology undergraduate MBBS final year exam topics 2024 2025
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I now have comprehensive information from authoritative textbooks (Goldman-Cecil Medicine, Harrison's, Brenner & Rector's Kidney, Comprehensive Clinical Nephrology) to compile high-yield nephrology MCQs. Let me now deliver a thorough, well-organized answer.
High-Yield Nephrology MCQs - MBBS Final Year
Here are the most frequently asked MCQ topics from Nephrology for undergraduate final year MBBS, compiled from Harrison's, Goldman-Cecil Medicine, Brenner & Rector's The Kidney, and Comprehensive Clinical Nephrology.
TOPIC 1: Nephrotic Syndrome
Q1. What is the most common cause of nephrotic syndrome in children?
- A) Focal segmental glomerulosclerosis (FSGS)
- B) Membranous nephropathy
- C) Minimal change disease
- D) Membranoproliferative GN
Answer: C - Minimal change disease (MCD)
Explanation: MCD is the most common cause in children. In adults, the order shifts - the most common causes of idiopathic/primary nephrotic syndrome in adults are: FSGS > Membranous nephropathy > Minimal change disease > MPGN. - Goldman-Cecil Medicine, Chapter 107
Q2. What is the nephrotic syndrome defined by?
- A) Proteinuria >1 g/day + hematuria
- B) Proteinuria >3.5 g/day + hypoalbuminemia + edema + hyperlipidemia
- C) Proteinuria >2 g/day + RBC casts
- D) Hematuria + hypertension + oliguria
Answer: B
Explanation: The nephrotic tetrad = massive proteinuria (>3.5 g/day/1.73 m²) + hypoalbuminemia + edema + hyperlipidemia/lipiduria. - Goldman-Cecil Medicine, Chapter 107
Q3. Nephrotic syndrome is associated with thromboembolism due to urinary loss of:
- A) Factor VIII and Factor V
- B) Antithrombin III, Protein C, and Protein S
- C) Fibrinogen and prothrombin
- D) Complement factors C3 and C4
Answer: B - Antithrombin III, Protein C, Protein S
Explanation: Loss of natural anticoagulants in urine creates a hypercoagulable state, predisposing to renal vein thrombosis, DVT, and pulmonary embolism. - Goldman-Cecil Medicine
Q4. Minimal change disease is associated with which malignancy?
- A) Solid tumors (lung/breast)
- B) Hodgkin lymphoma
- C) Non-Hodgkin lymphoma
- D) Renal cell carcinoma
Answer: B - Hodgkin lymphoma
Explanation: Minimal change disease is classically associated with Hodgkin lymphoma (and leukemias/lymphomas). Solid tumors (e.g., lung, colon) are associated with membranous nephropathy. - Goldman-Cecil Medicine, Table 107-3
Q5. Membranous nephropathy is associated with antibodies to:
- A) Anti-GBM antibody
- B) M-type phospholipase A2 receptor (PLA2R)
- C) Anti-ds DNA
- D) ANCA (MPO/PR3)
Answer: B - PLA2R antibody
Explanation: Idiopathic membranous nephropathy has been strongly associated with antibodies to the M-type phospholipase A2 receptor (PLA2R) - a key exam fact from recent years. - Goldman-Cecil Medicine, Harrison's 22E
TOPIC 2: Nephritic Syndrome & Glomerulonephritis Patterns
Q6. The hallmark finding in acute nephritic syndrome on urine microscopy is:
- A) Broad waxy casts
- B) Dysmorphic RBCs and RBC casts
- C) White cell casts
- D) Oval fat bodies
Answer: B - Dysmorphic RBCs and RBC casts
Explanation: RBC casts indicate glomerular bleeding and are pathognomonic of nephritic syndrome. Broad waxy casts = CKD; WBC casts = pyelonephritis or interstitial nephritis; oval fat bodies = nephrotic syndrome. - Goldman-Cecil Medicine
Q7. Post-streptococcal glomerulonephritis (PSGN) - the organism responsible is:
- A) Staphylococcus aureus
- B) Group A beta-hemolytic streptococcus (nephritogenic strains)
- C) Streptococcus pneumoniae
- D) E. coli
Answer: B - Group A beta-hemolytic streptococcus, nephritogenic strains
Explanation: PSGN occurs after infection with nephritogenic strains of Group A beta-hemolytic streptococci. It is predominantly a disease of childhood. Classic finding: low C3, normal C4. - Goldman-Cecil Medicine, Brenner & Rector
Q8. The complement profile in PSGN vs. SLE nephritis is:
| PSGN | SLE Nephritis | |
|---|---|---|
| C3 | Low | Low |
| C4 | Normal | Low |
This is a very high-yield table for MCQs!
- PSGN: Low C3, normal C4 (alternative pathway activation)
- SLE: Low C3 AND low C4 (classical pathway activation)
Q9. The most common cause of glomerular hematuria worldwide is:
- A) Post-streptococcal GN
- B) FSGS
- C) IgA nephropathy (Berger's disease)
- D) Membranoproliferative GN
Answer: C - IgA nephropathy
Explanation: IgA nephropathy (Berger's disease) is the most common pattern of glomerulonephritis worldwide and the most common cause of glomerular hematuria. It classically presents with episodic gross hematuria concurrent with or immediately after an upper respiratory infection (synpharyngitic hematuria - within 1-2 days, vs. PSGN which has a 10-21 day latent period). - Harrison's 22E, Campbell-Walsh Urology
Q10. Goodpasture syndrome involves antibodies against:
- A) Podocin
- B) Type IV collagen (anti-GBM antibody)
- C) Phospholipase A2 receptor
- D) MPO (ANCA)
Answer: B - Type IV collagen (anti-GBM antibody)
Explanation: Goodpasture syndrome is a pulmonary-renal syndrome caused by anti-GBM antibodies directed against the NC1 domain of type IV collagen. Biopsy shows linear IgG deposits. - Harrison's 22E
TOPIC 3: Rapidly Progressive GN (RPGN) / Crescentic GN
Q11. RPGN is characterized by crescents in what percentage of glomeruli on biopsy?
- A) >10%
- B) >25%
- C) >50%
- D) >75%
Answer: C - >50% crescents
Explanation: RPGN (crescentic GN) is defined by crescents in >50% of glomeruli on biopsy. The term RPGN is the clinical equivalent of crescentic GN pathologically. - Brenner & Rector's The Kidney
Q12. RPGN Type III (pauci-immune) is associated with:
- A) Anti-GBM antibody (linear IgG)
- B) Immune complex deposition (granular IgG)
- C) ANCA (MPO or PR3)
- D) IgA mesangial deposits
Answer: C - ANCA (pauci-immune, little/no immunoglobulin)
| RPGN Type | Mechanism | Antibody | Immunofluorescence |
|---|---|---|---|
| Type I | Anti-GBM | Anti-GBM | Linear IgG |
| Type II | Immune complex | Varies | Granular |
| Type III | Pauci-immune | ANCA (MPO/PR3) | No/minimal Ig |
TOPIC 4: Chronic Kidney Disease (CKD)
Q13. CKD is defined as kidney damage or GFR <60 mL/min/1.73m² for more than:
- A) 1 month
- B) 3 months
- C) 6 months
- D) 12 months
Answer: B - 3 months
Explanation: Per KDIGO guidelines, CKD = kidney damage or GFR <60 mL/min/1.73m² persisting for >3 months with implications for health. - Comprehensive Clinical Nephrology, 7th Ed.
Q14. CKD staging by GFR (KDIGO):
| Stage | GFR (mL/min/1.73m²) |
|---|---|
| G1 | ≥90 (normal/high, with markers of damage) |
| G2 | 60-89 (mildly decreased) |
| G3a | 45-59 |
| G3b | 30-44 |
| G4 | 15-29 |
| G5 | <15 (kidney failure) |
Q15. The most common cause of CKD in adults in developed countries is:
- A) Chronic GN
- B) Diabetic nephropathy
- C) Hypertensive nephrosclerosis
- D) Polycystic kidney disease
Answer: B - Diabetic nephropathy
Explanation: Diabetes mellitus is the single most common cause of CKD and end-stage renal disease (ESRD) worldwide. Hypertension is the second most common. - Goldman-Cecil Medicine
TOPIC 5: Acute Kidney Injury (AKI)
Q16. AKI - Urine cast findings:
| Cause | Urine Cast |
|---|---|
| Acute Tubular Necrosis (ATN) | Muddy brown granular casts |
| RPGN | RBC casts |
| Acute Interstitial Nephritis | WBC casts, eosinophiluria |
| CKD | Broad waxy casts |
| Nephrotic syndrome | Oval fat bodies, fatty/waxy casts |
This table is extremely high-yield for MCQs.
Q17. The most common cause of intrinsic (parenchymal) AKI is:
- A) Acute interstitial nephritis
- B) Acute tubular necrosis (ATN)
- C) Rapidly progressive GN
- D) Renal vein thrombosis
Answer: B - Acute tubular necrosis (ATN)
Explanation: ATN (ischemic or nephrotoxic) is the most common cause of intrinsic AKI in hospitalized patients. - Multiple sources
TOPIC 6: Key Associations (Extremely High-Yield)
| Condition | Key Association |
|---|---|
| Minimal change disease | Hodgkin lymphoma, NSAIDs, fusion of foot processes on EM |
| Membranous nephropathy | Solid tumors, Hep B, PLA2R antibody, subepithelial deposits ("spike and dome") |
| FSGS | HIV (collapsing FSGS), heroin, obesity, sickle cell |
| IgA nephropathy | Synpharyngitic hematuria, mesangial IgA deposits |
| PSGN | Subepithelial "humps" on EM, low C3 normal C4 |
| Goodpasture | Linear IgG, anti-GBM, pulmonary hemorrhage + GN |
| Alport syndrome | X-linked, sensorineural deafness, thinning/splitting of GBM |
| Diabetic nephropathy | Kimmelstiel-Wilson nodules, diffuse + nodular glomerulosclerosis |
| Amyloidosis | Congo red staining, apple-green birefringence |
TOPIC 7: Renal Tubular Defects
Q18. Fanconi syndrome involves dysfunction of which nephron segment?
- A) Distal convoluted tubule
- B) Loop of Henle
- C) Proximal convoluted tubule
- D) Collecting duct
Answer: C - Proximal convoluted tubule
Explanation: Fanconi syndrome = generalized PCT dysfunction leading to urinary wasting of glucose, amino acids, phosphate, uric acid, bicarbonate, and potassium.
Q19. Bartter syndrome vs Gitelman syndrome:
| Feature | Bartter | Gitelman |
|---|---|---|
| Defect | TAL (NKCC2) | DCT (NCC) |
| Hypocalciuria | No | Yes |
| Hypomagnesemia | No | Yes |
| Presentation | Childhood, severe | Adults, mild |
TOPIC 8: Renal Vein Thrombosis
Q20. Renal vein thrombosis complicates nephrotic syndrome most commonly in:
- A) Minimal change disease
- B) Membranous nephropathy
- C) FSGS
- D) IgA nephropathy
Answer: B - Membranous nephropathy
Explanation: Renal vein thrombosis has the highest association with membranous nephropathy among the nephrotic syndromes, occurring in up to 30-40% of cases. - Goldman-Cecil Medicine
Quick Revision Summary of "Firsts/Mosts"
| Fact | Answer |
|---|---|
| Most common nephrotic in children | Minimal change disease |
| Most common nephrotic in adults | FSGS (Blacks), Membranous (Whites) |
| Most common GN worldwide | IgA nephropathy |
| Most common cause of ESRD | Diabetic nephropathy |
| Most common intrinsic AKI | ATN |
| Linear IgG on IF | Goodpasture / anti-GBM disease |
| Granular IgG on IF | Immune complex GN (PSGN, lupus, MPGN) |
| Subepithelial humps on EM | PSGN |
| Spike and dome on EM | Membranous nephropathy |
| Fusion of foot processes on EM | Minimal change disease |
Sources: Goldman-Cecil Medicine International Edition (Vol 2, Ch. 107), Harrison's Principles of Internal Medicine 22E (Ch. 326-328), Brenner & Rector's The Kidney (9th Ed), Comprehensive Clinical Nephrology 7th Edition
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