title: [Malignant sacrococcygeal teratoma in an adult woman].
abstract: BACKGROUND
  Sacrococcygeal teratomas are neoplasms that are ordinarily diagnosed intrauterinely. In case of complete or partial intrapelvic sacrococcygeal teratoma, it may happen that it is only ascertained at a later age.
  
  
  METHODS
  During a regular monitoring visit for breast cancer a 58-year-old female reported that she had discovered a swelling at the level of her coccyx. MRI imagery appeared to indicate an ectopic ovary. After resection, it appeared that it was a mature teratoma from which mucinous adenocarcinoma had developed.
  
  
  CONCLUSIONS
  Given the risk of malignant deterioration, it is important that sacrococcygeal teratoma be recognized and treated by means of complete resection, including resection of the coccygeal bone.
authors.affiliation: Westfriesgasthuis, afd. Heelkunde, Hoorn, the Netherlands. a.beganovic@jbz.nl
authors.forename: Aida
authors.initials: A
authors.lastname: Beganović
authors.forename: Dirk J A
authors.initials: DJ
authors.lastname: Sonneveld
authors.forename: Ruud S
authors.initials: RS
authors.lastname: Blokker
authors.forename: Jan Willem D
authors.initials: JW
authors.lastname: de Waard
mesh_terms: D002828:Choristoma / Q000175:diagnosis* / Q000601:surgery; D005260:Female; D006801:Humans; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000175:diagnosis* / Q000601:surgery; D012445:Sacrococcygeal Region; D013724:Teratoma / Q000175:diagnosis* / Q000601:surgery; D016896:Treatment Outcome