MRCP2-3819

A 67-year-old man presents to the emergency department complaining of pain in his right forearm. He has a medical history of hypertension and end-stage renal failure and is currently taking ramipril, amlodipine, and doxazosin.

Upon examination, an arteriovenous fistula is observed in the right forearm, with an audible bruit. No other swelling or erythema is present, and there is no pain when the forearm is moved passively. The hand’s color appears normal.

What is the probable diagnosis?