The exact underlying cause of<unk>  is unknown. Some evidence suggests trauma may play a role in its development as it mainly presents in weight-bearing joints. Infection has also been considered as a contributing factor. The condition is not inherited.<unk>  can reportedly occur as either a primary or secondary form. Primary<unk> , which is more rare, occurs spontaneously and does not appear to relate to any pre-existing conditions. Secondary<unk>  is the more common form and often occurs when there is pre-existent osteoarthritis, rheumatoid arthritis, osteonecrosis, osteochondritis dissecans, neuropathic osteoarthropathy (which often occurs in diabetic individuals), tuberculosis, or osteochondral fractures (torn cartilage covering the end of a bone in a joint) in the affected individual.
Synovial chondromatosis
Synovial osteochondromatosis
Osteochondroma
Tenosynovial giant cell tumor
Meniscal cyst
Myositis ossificans
Osteochondritis dissecans
Osteochondrosis