Acute Kidney Injury USMLE Step 1 Practice Question
A 10-year-old boy presents with a 3-day history of abdominal pain, arthralgia, and a palpable purpuric rash on the lower extremities. Vital signs show BP 128/82 mmHg, HR 98/min, RR 20/min, temperature 37.2°C, and SpO2 98% on room air. Urinalysis reveals hematuria and mild proteinuria; serum creatinine is 1.2 mg/dL. He denies recent upper respiratory infection. Which of the following renal lesions is most likely present?
Answer choices
- AAmyloid deposition
- BSubepithelial humps
- CNodular glomerulosclerosis
- DMesangial IgA depositionCorrect answer
- ELinear IgG along basement membranes
- FSubendothelial immune complex deposition
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