Synovial sarcoma of the hypopharynx.
D000293:Adolescent; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D010610:Pharyngeal Neoplasms / Q000473:pathology* / Q000601:surgery / Q000648:ultrastructure; D013584:Sarcoma, Synovial / Q000473:pathology* / Q000601:surgery / Q000648:ultrastructure