Acute Kidney Injury USMLE Step 1 Practice Question
A 65-year-old man with hypertension and diabetes presents with acute onset oliguria and serum creatinine of 4.2 mg/dL (baseline 1.0 mg/dL). Urinalysis shows muddy brown casts. He took ibuprofen for back pain 2 days ago. Fractional excretion of sodium (FENa) is 0.3%. Which of the following is the most likely diagnosis?
Answer choices
- APostrenal acute kidney injury
- BAcute glomerulonephritis
- CAcute interstitial nephritis
- DAcute tubular necrosis
- EPrerenal acute kidney injuryCorrect answer
- FHepatorenal syndrome
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