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?
- A)Amyloid deposition
- B)Subepithelial humps
- C)Nodular glomerulosclerosis
- D)Mesangial IgA depositionGABARITO
- E)Linear IgG along basement membranes
Explicação
Mesangial IgA deposition is correct. Henoch Schonlein purpura, now called IgA vasculitis, shares the same renal lesion as IgA nephropathy. Palpable purpura, arthralgia, abdominal pain, and subsequent hematuria are classic findings. Ver explicação completa e trilha adaptativa →