IMR Press / CEOG / Volume 44 / Issue 6 / DOI: 10.12891/ceog3606.2017

Clinical and Experimental Obstetrics & Gynecology (CEOG) is published by IMR Press from Volume 46 Issue 1 (2019). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on as a courtesy and upon agreement with S.O.G.

Open Access Case Report
Spontaneous ovarian heterotopic pregnancy mimicking ovarian malignant tumor: case report
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1 Department of Obstetrics and Gynecology, Matsushita Memorial Hospital, Osaka, Japan
Clin. Exp. Obstet. Gynecol. 2017, 44(6), 946–948;
Published: 10 December 2017

Spontaneous ovarian heterotopic pregnancy is extremely rare. Ovarian ectopic pregnancy frequently resembles hemorrhagic corpus luteum cyst, but possibly mimics ovarian malignant tumor due to inhomogeneous echogenic appearance in some instances. Emergency laparotomy was performed for a seven-week spontaneous ovarian heterotopic pregnancy, because the ovarian cystic tumor exhibited a solid part on ultrasonography, therefore malignancy could not be ruled out. Postoperative course was uneventful, and the intrauterine fetus grew without complications, resulting in spontaneous vaginal delivery at 39 weeks of gestation. The possibility of an ovarian heterotopic pregnancy should be suspected, when an ovarian tumor is detected during pregnancy. These findings help physicians to diagnose ovarian heterotopic pregnancy or isolated ovarian ectopic pregnancy, to reduce maternal morbidity and mortality, and provide satisfactorily ongoing intrauterine gestation in heterotopic pregnancy.
Ovarian heterotopic pregnancy
Ovarian tumor
Emergency laparotomy
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