Given the patient's age and similar sizes of intra-articular bodies, primary synovial chondromatosis is preferred over the secondary counterpart which is related to more severe degenerative changes and older age group.

Synovial osteochondromatosis is also known as Reichel syndrome which is characterized by synovial metaplasia resulting in multiple intra-articular uniform loose bodies, some of which are ossified. Secondary type results from degenerative changes of the joint which is usually seen in an older age group with fewer and larger loose bodies.

Presentation with pain and swelling. Radiologic features depend on the stage of the disease and the presence or absence of calcification of the cartilaginous nodules.