title: A case of ochronotic arthropathy treated with total hip arthroplasty.
abstract: Abstract 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.
authors.affiliation: Department of Orthopedic Surgery, Hyogo College of Medicine , 1-1 Mukogawa-cho, Nishinomiya 663-8501 , Japan.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Inoue
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Iwata
authors.forename: Kousei
authors.initials: K
authors.lastname: Yoh
authors.forename: Yoshiteru
authors.initials: Y
authors.lastname: Nakamura
authors.forename: Souji
authors.initials: S
authors.lastname: Maruo