title: Radiographic investigation of popliteal cysts.
abstract: Forty-one patients with popliteal cysts were examined radiographically. All cysts consisted of a dilated gastrocnemio-semimembranosus bursa. A valve mechanism at the site of their communication with the joint was demonstrated by a specific radiographic technique in the majority of cases. The radiographic findings in popliteal cyst ruptures simulating deep venous thrombosis are described.
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D007592:Joint Diseases / Q000000981:diagnostic imaging; D007719:Knee Joint / Q000000981:diagnostic imaging*; D011859:Radiography; D013581:Synovial Cyst / Q000000981:diagnostic imaging*; D013927:Thrombosis / Q000000981:diagnostic imaging