An 11-year-old boy is brought to the physician by his mother for a 12-hour history of dark urine. He has no past medical history and takes no medications. 3 days ago, he had a sore throat and fever. Today he has a dry cough. There is no cervical lymphadenopathy. There are no tonsillar exudates. Vitals are normal. Which of the following is most likely to be seen in this patient?
Dense deposits and duplication of glomerular basement membrane
Hyaline deposition within the mesangium
Immune complex deposition in a subepithelial distribution
Mesangial proliferation and mucosal immunoglobulin deposition
No changes on light microscopy
Subendothelial deposits with capillary loop thickening
