title: A synovial sarcoma beneath the pectoralis major muscle.
abstract: Synovial sarcoma is a rare malignant neoplasm that develops most frequently in the extremities. A 68-year-old man presented with a painful mass on the right side of his chest with a 10-year history. Gross findings revealed a mass beneath the pectoralis major muscle. The pathologic findings showed the tumor was predominantly composed of spindle cells the arranged in compact interdigitating fascicles and scattered epithelial nests were seen. A diagnosis of synovial sarcoma was made.
authors.affiliation: Department of Dermatology, Otemae Hospital, Osaka, Japan.
authors.forename: Toshie
authors.initials: T
authors.lastname: Yano
authors.forename: Chizuko
authors.initials: C
authors.lastname: Inoue
authors.forename: Kenji
authors.initials: K
authors.lastname: Yano
mesh_terms: D000368:Aged; D001707:Biopsy, Needle; D005500:Follow-Up Studies; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D019042:Muscle Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery*; D010369:Pectoralis Muscles / Q000473:pathology*; D013584:Sarcoma, Synovial / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome