Which of the following is the most likely diagnosis? A 52-year-old man with a family history of renal failure comes to the physician because of abdominal pain over the last 6 months. He has been treated in the past for renal calculi and hypertension. Physical examination shows bilateral palpable masses in the upper abdomen. Urinalysis shows crenated erythrocytes and mild proteinuria. A CT scan of the abdomen identifies the cause of the patient’s problem.
A. Adrenal adenoma B. Glomerulonephritis C. Henoch-Schonlein purpura D. Polycystic kidney disease E. Renal cell adenoma