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
Treatment and prognosis
Rupture of a cornual pregnancy can cause a catastrophic intra-abdominal bleed.
- 1. Lin EP, Bhatt S, Dogra VS. Diagnostic clues to ectopic pregnancy. Radiographics. 2008;28 (6): 1661-71. doi:10.1148/rg.286085506 - Pubmed citation
- 2. Bavelloni A, Piazzi M, Raffini M, Faenza I, Blalock WL. Prohibitin 2: At a communications crossroads. IUBMB life. 67 (4): 239-54. doi:10.1002/iub.1366 - Pubmed