A 6-Year-Old Boy Is Brought to the Emergency Department Because

A 6-year-old boy is brought to the emergency department because of a 1-day history of colicky abdominal pain and vomiting. He also had a sore throat 2 weeks ago. His temperature is 37.0°C (98.6°F) , pulse is 100/min, respirations are 28/min, and blood pressure is 90/55 mm Hg. Examination of the lower extremities shows nonblanching raised erythematous papules. The abdomen is soft and nontender. Bowel sounds are high-pitched.  Urinalysis results are as follows: Which of the following renal abnormalities is most likely present in this patient?

A) Glomerular basement membrane thickening
B) Linear deposition of IgG on the basement membrane
C) Localized areas of mesangial sclerosis and collapse
D) Mesangial deposition of IgA
E) Podocyte fusion
F) Subepithelial immune complex deposition

Correct Answer:

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