First-trimester diagnosis of cesarean scar ectopic pregnancy

J Clin Ultrasound. 2008 Oct;36(8):504-11. doi: 10.1002/jcu.20471.

Abstract

Once considered extremely rare, implantation of a pregnancy within the scar of a previous cesarean section is becoming more common. In fact, its incidence is now higher than that of cervical ectopic pregnancies. We identified 5 cases of ectopic pregnancy implanted in a prior cesarean section scar at our institution since 2004. We outline the criteria for the first-trimester sonographic diagnosis of cesarean scar ectopic pregnancy, including a new sign of lower uterine segment ballooning, which has previously not been reported. Clinicians must have a heightened awareness of this serious and potentially fatal pregnancy complication.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Cesarean Section / adverse effects*
  • Cicatrix / diagnostic imaging*
  • Female
  • Gravidity
  • Humans
  • Parity
  • Pregnancy
  • Pregnancy Complications / diagnostic imaging*
  • Pregnancy Outcome
  • Pregnancy Trimester, First
  • Pregnancy, Ectopic / diagnostic imaging*
  • Pregnancy, Ectopic / therapy
  • Ultrasonography, Prenatal*