Renal and Urinary: Glomerulonephritis, AKI · USMLE Step 1

A patient presents with oliguria and muddy brown casts. Which diagnosis is most likely?

  1. Acute interstitial nephritis
  2. Acute tubular necrosis
  3. Membranous nephropathy
  4. Minimal change disease
Show answer and explanation

Correct answer: Acute tubular necrosis

Muddy brown casts are characteristic of acute tubular necrosis, typically due to ischemia or nephrotoxins.

Difficulty: Medium Question 7 of 20

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