Abstract
We experienced a case of synovial osteochondromatosis of the hip joint. The patient, a 46-year-old woman, had been suffering from coxalgia and limited hip motion, especially flexion and internal rotation, for about one year. Roentgenography and CTscan showed many calcified masses in the right hip joint. T2-weighted MRI showed many nodular lesions. Synovial osteochondromatosis was suspected and surgery was performed using the Ganz approach with anterior dislocation of the hip. We found 24 cartilaginous masses in the hip joint, but no nodular lesions within the synovium. Microscopic examination confirmed that the masses were cartilaginous. The case was therefore diagnosed as synovial osteochondromatosis of the hip joint. At 6 months after the operation, the patient had no pain in the hip and walked without a limp. Range of motion of the hip was improved, and there was no longer any flexion contracture. The Ganz approach is useful when wide examination of the hip joint is necessary.
