title: Chordoma cutis: a report of nineteen patients with cutaneous involvement of chordoma.
abstract: BACKGROUND
  Chordoma, an uncommon tumor originating from remnants of the notochord, with cutaneous involvement has rarely been reported.
  
  
  OBJECTIVE
  Our purpose was to document clinical manifestations, histopathologic features, immunohistochemical findings, treatment, and course of chordoma with cutaneous involvement.
  
  
  METHODS
  Pathologically proven cases of chordoma were reviewed retrospectively for cutaneous involvement. Detailed clinical data and histopathologic changes were studied. Skin biopsy specimens were stained for immunohistochemical phenotyping.
  
  
  RESULTS
  Of 207 cases of chordoma, 19 had skin involvement: as local recurrences or metastasis in 12, as direct extension of primary tumor in 6, and as a result of distant metastasis from sacrococcygeal chordoma in 1. Local recurrences were frequent, but distant metastasis to various organs, including skin, occurred.
  
  
  CONCLUSIONS
  We propose the term chordoma cutis to describe this condition. In seven patients, cutaneous lesions were detected when the diagnosis of primary chordoma was made.
authors.affiliation: Department of Dermatology, Mayo Clinic, Rochester, MN 55905.
authors.forename: W P
authors.initials: WP
authors.lastname: Su
authors.forename: J B
authors.initials: JB
authors.lastname: Louback
authors.forename: E J
authors.initials: EJ
authors.lastname: Gagne
authors.forename: B W
authors.initials: BW
authors.lastname: Scheithauer
mesh_terms: D000328:Adult; D000368:Aged; D002423:Cause of Death; D002467:Cell Nucleus / Q000648:ultrastructure; D002817:Chordoma / Q000473:pathology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007150:Immunohistochemistry; D007633:Keratins / Q000032:analysis; D008297:Male; D008875:Middle Aged; D009418:S100 Proteins / Q000032:analysis; D012445:Sacrococcygeal Region; D012878:Skin Neoplasms / Q000473:pathology*; D015996:Survival Rate; D014617:Vacuoles / Q000648:ultrastructure; D014746:Vimentin / Q000032:analysis
chemical_list: D009418:S100 Proteins; D014746:Vimentin; D007633:Keratins