title: Primary breast synovial sarcoma: a rare primary breast neoplasm.
abstract: A primary synovial sarcoma based on the breast is rare. The usual tumours on the breast are carcinomas. Synovial sarcomas account for about 6-9% of soft tissue sarcomas and most commonly develop in the extremity of young adults (80%). The other 20% of synovial sarcomas can arise in non-extremity sites (trunk 8%, retroperitoneal/ abdominal 7%, head and neck 5%) but synovial sarcomas can develop in almost any other anatomical location. We report a case of a young woman who presented with a suspected common breast tumour and started treatment of this tumour with carcinoma neoadjuvant chemotherapy. We were surprised when the pathologist identified a synovial sarcoma in the histopathology study.
authors.affiliation: Servicio de Oncología Radioterápica, Hospital Universitari Sant Joan d'Alacant, Sant Joan d'Alacant, Alicante, Spain. vitorfe@coma.es
authors.forename: Vicente
authors.initials: V
authors.lastname: Tormo
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Andreu
mesh_terms: D000328:Adult; D001943:Breast Neoplasms / Q000175:diagnosis* / Q000453:epidemiology; D005260:Female; D006801:Humans; D015994:Incidence; D013584:Sarcoma, Synovial / Q000175:diagnosis* / Q000453:epidemiology