Synovial sarcoma of the foot.
D005534:Foot Diseases / Q000473:pathology*; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D013584:Sarcoma, Synovial / Q000473:pathology* / Q000648:ultrastructure; D012878:Skin Neoplasms / Q000473:pathology* / Q000648:ultrastructure