M66.1: Rupture of synovium

Rupture of synovium, classified under the ICD-10 code M66.1, is a medical condition involving the tearing or bursting of the synovial membrane, a thin tissue that lines the cavities of joints such as knees, wrists, and elbows. This membrane produces synovial fluid, which facilitates the smooth movement of joints. The rupture can occur spontaneously but is usually associated with direct trauma to the joint or can be an aftermath of a degenerative joint disease. When a rupture occurs, patients may experience pain and inflammation in the affected area, difficulty in moving the joint, and localized swelling. In more severe cases, accumulation of synovial fluid, known as joint effusion, can occur in the adjoining areas leading to the formation of synovial cysts. The progression of the condition may vary depending on several factors including the severity of rupture, individual health condition, and the promptness of medical attention received.