Renal Pathology Practice Questions

Q: Broad granular casts are typically seen in which of the following conditions?

Chronic renal failure. **Explanation:** **Broad granular casts** (also known as "Renal Failure Casts") are the hallmark of **Chronic Renal Failure (CRF)**. Their formation is a direct result of the pathophysiology of end-stage renal disease [2]. In CRF, there is significant compensatory hypertrophy and dilation of the remaining functional nephrons. As urine flow slows down within these dilated tubules, cellular debris and proteins (Tamm-Horsfall protein) aggregate and solidify. Because the diameter of these tubules is much larger than normal, the resulting casts are significantly wider ("broad") than typical casts. **Analysis of Incorrect Options:** * **Glomerular injury:** Typically presents with **RBC casts** [1] (pathognomonic for glomerulonephritis) or fatty casts (in nephrotic syndrome). * **Thrombotic microangiopathy (TMA):** Characterized by microvascular thrombi and schistocytes on peripheral smear; it does not typically produce broad casts. * **Pyelonephritis:** Characterized by **WBC (leukocyte) casts**, which indicate tubulointerstitial inflammation or infection. **NEET-PG High-Yield Pearls:** * **Broad Casts:** Indicate severe, chronic stasis in dilated, "end-stage" nephrons. * **Hyaline Casts:** Most common; can be normal (after exercise/dehydration) [1]. * **Muddy Brown (Granular) Casts:** Pathognomonic for **Acute Tubular Necrosis (ATN)**. * **Waxy Casts:** Found in chronic renal failure; they represent the final stage of granular cast degeneration and indicate very low urine flow. * **RBC Casts:** Always pathological; indicate a glomerular source of bleeding (e.g., Nephritic syndrome) [1]. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 520-521. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Pancreas, pp. 903-905.

Question 1

What is the first pathological change apparent in Nephrotic syndrome?

Accepted Answer

Thickening of the glomerular capillary wall and effacement of podocyte foot processes

Answer

Segmental sclerosis of glomerulus

Answer

Break in basement membrane

Answer

Mononuclear infiltration

Question 2

Maximum 'Endocapillary Proliferation' is seen in which of the following conditions?

Accepted Answer

Post-streptococcal glomerulonephritis

Answer

Membranous glomerulonephritis

Answer

Mesangioproliferative glomerulonephritis

Answer

Focal segmental glomerulonephritis

Question 3

Which of the following conditions can cause rapidly progressive glomerulonephritis?

Accepted Answer

Wegener's granulomatosis

Answer

Focal segmental glomerulosclerosis (FSGS)

Answer

Goodpasture's syndrome

Answer

Polyarteritis nodosa (PAN)

Question 4

Which protein in the glomerular basement membrane (GBM) is responsible for charge-dependent filtration?

Accepted Answer

Proteoglycan

Answer

Albumin

Answer

Collagen type IV

Answer

Fibronectin

Question 5

Broad granular casts are typically seen in which of the following conditions?

Accepted Answer

Chronic renal failure

Answer

Glomerular injury

Answer

Thrombotic microangiopathy

Answer

Pyelonephritis

Renal Pathology — MCQs

Renal Pathology — MCQs

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