Abstract
Primary gestational choriocarcinoma is commonly present in the uterus in cases of atypical genital bleeding. Symptoms similar to those of an ectopic pregnancy develop when an extra-uterine lesion is present in the abdominal cavity, and lesions have been detected in the ovaries and fallopian tubes in a number of cases. In the present study, we describe a patient with choriocarcinoma that metastasized to the uterine serosa and caused symptoms similar to those of an ectopic pregnancy. The patient was a 30-year-old female who presented to our hospital with atypical genital bleeding and a positive pregnancy test 3 months after missed abortion at 10 weeks of gestation. Transvaginal ultrasonography revealed the absence of a gestational sac in or outside the uterus, and intra-abdominal bleeding was noted. An ectopic pregnancy was suspected based on these findings, and emergency laparotomy was performed. A hemorrhagic mass was present on the uterine serosa, and was subsequently resected. Trophoblastic disease was suspected following histopathological examination, for which intra-uterine curettage was performed and choriocarcinoma was diagnosed. Lung metastasis was detected on computed tomography, and a high serum human chorionic gonadotropin (hCG) level persisted following surgery. The lesion disappeared following five cycles of methotrexate+ etoposide+actinomycin D therapy, which was performed as postoperative chemotherapy, and the patient's serum hCG level decreased to below the detection limit. In this case of choriocarcinoma, the primary lesion was present in the uterus and had metastasized to the uterine serosa, which is a very rare metastatic site. This uterine serosal metastatic lesion bled and caused symptoms similar to those of an ectopic pregnancy. Certain patients who undergo surgery for a suspected peritoneal pregnancy may have gestational choriocarcinoma, similar to this case.
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