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Case Reports in Obstetrics and Gynecology
Volume 2015, Article ID 143031, 3 pages
Case Report

A Case of Ovarian Pregnancy Diagnosed by MRI

1Department of Gynecology and Obstetrics, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
2Department of Obstetrics and Gynecology, Kurashiki Central Hospital, Japan
3Department of Diagnostic Radiology, Kurashiki Central Hospital, Japan

Received 23 July 2015; Accepted 13 September 2015

Academic Editor: Giovanni Monni

Copyright © 2015 Shingo Io et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Ovarian pregnancy is a rare form of ectopic pregnancy, causing a great diagnostic challenge. We report a case of ovarian pregnancy in a 42-year-old woman, in whom MRI successfully demonstrated the implantation in the ovary. Transvaginal ultrasonography showed an echogenic mass in the right ovary but failed to demonstrate tubal pregnancy. T2-weighted MR images disclosed a gestational sac structure in the right ovary, which exhibited heterogeneous high intensity intermingled with punctate foci of distinct low intensity. MRI may be a useful tool for diagnosing ovarian pregnancy, by demonstrating a gestational sac in the ovary.