Popliteal cyst.
D000328:Adult; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging*; D008297:Male; D011151:Popliteal Cyst / Q000000981:diagnostic imaging* / Q000601:surgery; D011859:Radiography; D013581:Synovial Cyst / Q000000981:diagnostic imaging*