We report a case of ochronotic arthropathy treated with total hip arthroplasty. The articular cartilage of the patient''s femoral head and synovium displayed black pigmentation. Microscopically, the articular cartilage revealed reddish-brown pigmentation (particularly in deep cartilage), necrotic chondrocytes, and slight black pigmentation in the cytoplasm of chondrocytes. Electron microscopy revealed electron-dense material deposited predominantly along and between collagen fibers.
Key words
Alcaptonuria - Ochronotic arthropathy - Total hip arthroplasty
