system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
An otherwise healthy 27-year-old man presents to the Emergency Department with dark urine and left flank pain. He has had a fever, sore throat, and malaise for the last 2 days. Vital signs reveal a temperature of 38.1°C (100.5°F), blood pressure of 120/82 mm Hg, and a pulse of 95/min. His family history is noncontributory. Physical examination reveals enlarged tonsils with tender anterior cervical lymphadenopathy. Urinalysis shows pink urine with 20–25 red cells/high power field and 2+ protein. This patient’s condition is most likely due to which of the following?
assistant
Diffuse mesangial IgA deposition