Acute Kidney Injury USMLE Step 1 Practice Question
A 3-year-old boy presents with 5 days of bloody diarrhea and now oliguria. Vital signs: BP 128/82 mmHg, HR 118/min, RR 24/min, Temp 37.2°C, SpO2 98% on room air. Serum creatinine is 2.8 mg/dL (baseline 0.4). Hemoglobin 7.2 g/dL, platelets 45,000/μL. Peripheral blood smear reveals schistocytes. Stool culture grows Shiga toxin-producing Escherichia coli. Urinalysis shows no proteinuria. Which of the following is the most likely diagnosis?
Answer choices
- ADisseminated intravascular coagulation
- BHemolytic uremic syndromeCorrect answer
- CIgA nephropathy
- DAcute post-infectious glomerulonephritis
- EThrombotic thrombocytopenic purpura
- FEnteroinvasive Escherichia coli infection with septic shock
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