Q. A 27-year-old man comes to the emergency department due to recurrent episodes of flank pain and bloody urine for the past 3 days. He has no chronic medical conditions but he had diarrhea and abdominal pain a week ago. His BP is 145/89 mmHg, HR is 90 bpm, RR is 20 bpm, and temperature is 38.3 degrees Celsius. Urinalysis results are shown in the table below. Which of the following would you expect to find on renal biopsy?