title: The natural history of sacrococcygeal teratomas diagnosed through routine obstetric sonogram: a single institution experience.
abstract: OBJECTIVE
  The antenatal diagnosis of sacrococcygeal teratoma (SCT) is increasingly being made with fetal sonography. However, the natural history of SCT detected on routine obstetric sonogram is not well defined.
  
  
  METHODS
  A retrospective chart review of 21 fetal SCT diagnosed on routine sonography at Hospital Sainte-Justine between 1980 and 1997 were performed. The patients' clinical and sonographic characteristics, prenatal, and perinatal outcomes were examined. Prognostic criteria were identified by correlating patients' characteristics with outcome.
  
  
  RESULTS
  In utero mortality rate was 19% and perinatal mortality rate was 14%. The incidence of premature labor was 50%. Of the various criteria examined as an independent variable, the presence of a solid tumor was found to be a important negative prognostic factor with a 67% incidence of death in utero and an overall mortality rate of 100%. Patients with new onset polyhydramnios were at significant risks for premature labor (100%). All of the perinatal deaths were attributable to tumor rupture.
  
  
  CONCLUSIONS
  The course of sacrococcygeal teratoma diagnosed on routine sonograms is associated with a higher-than-expected incidence of prenatal and perinatal complications. Close antenatal follow-up for new onset polyhydramnios and the presence of a completely solid tumor will help optimize patient counseling and treatment.
authors.affiliation: Department of Surgery, Hospital Sainte-Justine, Montreal, Quebec, Canada.
authors.forename: A X
authors.initials: AX
authors.lastname: Holterman
authors.forename: D
authors.initials: D
authors.lastname: Filiatrault
authors.forename: M
authors.initials: M
authors.lastname: Lallier
authors.forename: S
authors.initials: S
authors.lastname: Youssef
mesh_terms: D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging; D005865:Gestational Age; D006801:Humans; D008297:Male; D011247:Pregnancy; D011256:Pregnancy Outcome; D011379:Prognosis; D012189:Retrospective Studies; D012445:Sacrococcygeal Region; D013724:Teratoma / Q000000981:diagnostic imaging; D016216:Ultrasonography, Prenatal