Cornual ectopic pregnancy

Cornual ectopic pregnancies are rare and represent a gestational sac within the cornua of a bicornuate or septate uterus. 

Although sometimes interchangeably used with interstitial pregnancy, cornual pregnancy specifically refers to the presence of a gestational sac within a rudimentary uterine horn, a unicornuate uterus, cornua of a bicornuate uterus or septate uterus. 

They are reported to represent less than 1% of all ectopic pregnancies 1.

  • interstitial line sign
  • eccentric position of sac: gestational sac is surrounded by a thin rim (<5 mm) of myometrium and is more than 1 cm from the lateral wall of the endometrial cavity 

Rupture of a cornual pregnancy can cause a catastrophic intra-abdominal bleed.

Share article

Article information

rID: 38937
Synonyms or Alternate Spellings:
  • Cornual ectopic
  • Ectopic pregnancy in Fallopian tube cornua
  • Ectopic pregnancy in bicornate or unicornate uterus
  • Cornual pregnancy

Support Radiopaedia and see fewer ads

Updating… Please wait.

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.