One week after a mild flulike illness, a 9-year-old boy has an episode of hematuria that subsides within 2 days. One month later, he tells his parents that his urine is red again. On physical examination, there are no significant findings. Urinalysis shows a pH of 7, specific gravity 1.015, 1+ proteinuria, 1+hematuria, and no ketones, glucose, or urobilinogen. The serum urea nitrogen level is 36 mg/dL, and the creatinine level is 3.2 mg/dL. A renal biopsy specimen shows diffuse mesangial proliferation and electron-dense deposits in the mesangium. Which of the following mechanisms is most likely to produce these findings?
Deposition of immune complexes containing IgAFormation of antibodies against type IV collagenVirus-mediated injury to the glomeruliCytokine-mediated injury to the glomerular capillariesAnswer and Explanation will be updated - Pathology revision course. ! - Subscribe here today and get solve more than 500+ questions before your exams. !