脛骨粗面前内方移動術後15年を経過した膝蓋大腿関節症病変部の所見

抄録

A 51-year-old woman had undergone anteromedial displacement of tibial tuberosity for the patello-femoral (PF) osteoarthritis of her left knee. At the time of surgery, an extensive area with exposure of the subchondral bone had been found at both the lateral articular surface of the patella and the opposite lateral aspect of the sulcus. She later came back working as a farmer with no symptons postoperatively. At 15 years after surgery, she underwent arthroscopic examination for traumatic chondral injury of the lateral femoral condyle. Under arthroscopy, the previous cartilage degenerative area in the PF compartment was found to be covered uniformly by a white repartative tissue, without any exposure of the subchondral bone. The pathological finding of this reparative tissue showed the characteristic feature of the fibrocartilage that has combined properties of the cartilage and fibrous tissue.