Abstract
Intraplacental choriocarcinoma is a rare type of gestational choriocarcinoma occurring in the placenta, of which only a small number of cases have been reported. Gestational choriocarcinoma rapidly metastasizes to organs such as the lung, brain, and liver; thus, early diagnosis and treatment are essential. In addition, intraplacental choriocarcinoma can affect fetal mortality. We present a case of a 33-year-old woman diagnosed with intraplacental choriocarcinoma based on placental biopsy performed after the pregnancy had reached term. The patient had pulmonary metastasis at the time of diagnosis, but after the combination chemotherapy with EMA-EP, complete remission is maintained.