Synovial Chondromatosis

Synovial chondromatosis is an uncommon benign lesion characterized by multiple cartilagenous and osteocartilagenous nodules of the synovium and loose bodies. The affection is monoarticular and most commonly involves the knee and has an unknown etiology. Of the five cases of synovial chondromatosis experienced by the authors, both knee joints were involved in a case, two the elbow joint, and one the proximal phalanx of the left middle finger. The diagnosis of synovial chondromatosis was made by the histopathological findings of the excised masses.