Glomerular And Tubulointerstitial Disease Practice Test

A 24-year-old man presents to the emergency department with severe shortness of breath and hemoptysis. He has also noted swelling in his legs and decreased urine output for the past week. His creatinine is 5.0 mg/dL. Urinalysis reveals dysmorphic red blood cells and RBC casts. A chest X-ray shows diffuse bilateral alveolar infiltrates.

A 10-year-old boy is brought to the clinic with a 3-day history of dark, 'cola-colored' urine and puffiness around his eyes. His mother reports he was treated for impetigo on his legs three weeks ago. Physical examination reveals a blood pressure of 145/95 mmHg and periorbital edema. Urinalysis shows 2+ protein, large blood, and red blood cell casts. A serum C3 level is low.