A 65-year-old man with cirrhosis and ascites develops acute kidney injury. Creatinine rises from 1.0 to 2.6 mg/dL over 48 hours despite albumin infusion and diuretic discontinuation. Urine sodium is <10 mEq/L. What is the most likely diagnosis?
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A
Acute tubular necrosis
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B
Prerenal azotemia
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C
Hepatorenal syndrome
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D
Contrast nephropathy