title: Metastatic synovial sarcoma of the scalp: Case report.
abstract: BACKGROUND
  Synovial sarcoma is a malignant tumor of soft tissue that is rarely found in the head and neck. Even less common are metastasis within the head and neck.
  
  
  METHODS
  We describe a case of a delayed metastatic synovial sarcoma to the scalp. A man who had been diagnosed and treated 16 years previously for monophasic synovial sarcoma of the groin, presented with a new scalp lesion confirmed to be metastatic monophasic synovial sarcoma. Wide local excision and sentinel lymph node biopsy (SLNB) were performed and adjuvant radiation therapy was deferred.
  
  
  RESULTS
  A positron emission tomography (PET)/CT was obtained 3 months after surgery and showed no evidence of local recurrence or metastatic disease.
  
  
  CONCLUSIONS
  This case report describes a rare case of synovial sarcoma metastasizing to the scalp. The genetic, histopathologic, and clinical features of synovial sarcoma are reviewed with a focus on their manifestation and management within the head and neck.
authors.affiliation: Department of Otolaryngology, University of Wisconsin-Madison, Madison, Wisconsin.
authors.forename: Dylan C
authors.initials: DC
authors.lastname: Lippert
authors.affiliation: Department of Otolaryngology, University of Wisconsin-Madison, Madison, Wisconsin.
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Britt
authors.affiliation: Department of Otolaryngology, University of Wisconsin-Madison, Madison, Wisconsin.
authors.forename: Zachary E
authors.initials: ZE
authors.lastname: Pflum
authors.affiliation: Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, Wisconsin.
authors.forename: Patrick S
authors.initials: PS
authors.lastname: Rush
authors.affiliation: Department of Otolaryngology, University of Wisconsin-Madison, Madison, Wisconsin.
authors.forename: Gregory K
authors.initials: GK
authors.lastname: Hartig
mesh_terms: D006258:Head and Neck Neoplasms / Q000556:secondary* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D013584:Sarcoma, Synovial / Q000473:pathology / Q000556:secondary* / Q000601:surgery; D012535:Scalp / Q000601:surgery; D012878:Skin Neoplasms / Q000556:secondary* / Q000601:surgery; D012983:Soft Tissue Neoplasms / Q000473:pathology*
keywords: head and neck neoplasm; metastatic; monophasic; scalp; synovial sarcoma