© 1974 British Society for Rheumatology
research-article |
POPLITEAL CYSTS AND SYNOVIAL RUPTURE IN OSTEOARTHROSIS
Royal National Hospital for Rheumatic Diseases Bath
The range of symptomatology produced by synovial protrusions in degenerative disease of the knee joint is demonstrated in five representative case histories. The most common mechanism is the formation of a popliteal cyst, which may be asymptomatic or painful. It may be in free communication with the knee joint or only fill after exercise. Rupture of the knee joint can occur, but the clinical picture is much less dramatic than with inflammatory joint disease. This is related to the less irritative character of osteoarthritic synovial fluid. The diagnosis is proved by arthrography, which is an easy and relatively painless procedure, but it is important that a post-exercise film is taken. Healing of the rupture site may occur rapidly, as shown in one case.