Gestational choriocarcinoma is a type of cancer that usually occurs in the uterus after a pregnancy. The cancer arises from the cells that form the placenta during pregnancy. There are several synonyms for this type of cancer, including gestational trophoblastic tumor, GTT, choriocarcinoma, and placental site trophoblastic tumor, PSTT. These tumors are relatively rare, accounting for only 1-2% of all gynecological cancers. Symptoms of gestational choriocarcinoma may include irregular vaginal bleeding, abdominal pain, and swelling. Treatment typically involves surgery, chemotherapy, or a combination of both, depending on the severity and stage of the cancer.