Primary extrauterine ovarian choriocarcinoma mistaken for ectopic pregnancy: Sonographic imaging findings

Choriocarcinoma is a rare malignant manifestation of gestational trophoblastic disease. Although it is most commonly caused by malignant transformation of a molar pregnancy, this tumor can develop after all types of pregnancy, including normal term pregnancy, spontaneous abortion, and ectopic pregnancy [1,2]. The most common location of choriocarcinoma is intrauterine; however, rare locations such as the fallopian tube, ovary, and elsewhere in the abdomen and pelvis have been reported [2-5]. To our knowledge, primary extrauterine ovarian choriocarcinoma has not been reported in the radiology literature, especially with its sonographic findings. We report a case of primary extrauterine ovarian choriocarcinoma that was mistaken for an ectopic pregnancy, resulting in a delay in diagnosis and proper management. © American Roentgen Ray Society.