Black Femoral Head Due to Ochronotic Arthropathy: A Case Report

Ochronotic arthropathy is a rare complication in patients with alkaptonuria (AKU) that occurs as a result of ochronotic pigment accumulation in the joints.

This case report presents a 54-year-old patient with severe degenerative arthritis who underwent total hip arthroplasty on both sides within an interval of three years. The diagnosis was made by observation of a dark capsule and femoral head during the second surgery. The surgical treatments significantly reduced the pain and improved the range of motion (ROM).

Orthopedic surgeons must be vigilant about clinical manifestations of this rare condition, before and during the surgery. Arthroplasty is a favourable therapeutic option in patients suffering from ochronotic arthropathy.