Dorsal tendosynovial cyst.
D005534:Foot Diseases / Q000473:pathology / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D009135:Muscular Diseases / Q000473:pathology / Q000601:surgery; D013581:Synovial Cyst / Q000473:pathology / Q000601:surgery; D013710:Tendons / Q000473:pathology / Q000601:surgery