[Intraarticular chondromatosis].

Intraarticular chondromatosis is subdivided into primary (synovial) and secondary one. Synovial chondromatosis is a benign, focal proliferation of cartilaginous tissue within the synovial membrane of a joint, articular bursa and tendons. More often synovial chondromatosis is present in the synovial membrane. Some nodules loose a bond to the synovial membrane and form chondromal intraarticular bodies that are freely located within the joint cavity. Secondary intraarticular chondromatosis develops in the presence of a pre-existing process, such as injury, degenerative joint diseases including osteoarthrosis. In secondary intraarticular chondromatosis, loose intraarticular bodies are most commonly formed on the basis of a small disconnected fragment of hyaline articular cartilage.