title: Perianal basal cell carcinoma.
abstract: BACKGROUND
  A case of basal cell carcinoma (BCC) of the perianal region is reported. This tumor is extremely rare in this location and behaves rather innocently.
  
  
  OBJECTIVE
  Clinical and histopathologic characteristics of perianal BCC, as well as the choices of treatment, are outlined.
  
  
  CONCLUSIONS
  The tumor should be histologically distinguished from basaloid carcinoma of the anus, which is much more aggressive and metastasizes early, thus requiring a different therapy.
authors.affiliation: Departament of Coloproctologic Surgery, Hospital de Clínicas de Porto Alegre (HCPA), Federal University of Rio Grande do Sul, Porto Alegre, Brazil. damin@zaz.com.br
authors.forename: Daniel C
authors.initials: DC
authors.lastname: Damin
authors.forename: Mario A
authors.initials: MA
authors.lastname: Rosito
authors.forename: Pedro
authors.initials: P
authors.lastname: Gus
authors.forename: Claudio
authors.initials: C
authors.lastname: Tarta
authors.forename: Marcos
authors.initials: M
authors.lastname: Weindorfer
authors.forename: Marcos B
authors.initials: MB
authors.lastname: Burger
authors.forename: Andre
authors.initials: A
authors.lastname: Cartell
mesh_terms: D000368:Aged; D001005:Anus Neoplasms / Q000473:pathology*; D002280:Basal Cell Carcinoma / Q000473:pathology*; D005260:Female; D006801:Humans