A 61-year-old man comes to the physician for a follow-up appointment. A renal biopsy is shown.
Which of the following is most likely to be seen in this patient?
A) Normal-appearing urine; no recent illness
B) Normal-appearing urine; sore throat 1 week ago
C) Red sputum following a cough
D) Red urine currently; sore throat 2 days ago
E) Red urine currently; sore throat 2 weeks ago
