Choriocarcinoma is a rare and aggressive form of cancer that occurs in the tissue that forms the placenta during pregnancy. In medical terminology, the condition is also known as trophoblastic cancer, gestational trophoblastic tumor, or molar pregnancy. Synonyms for choriocarcinoma include chorioblastoma, chorionic epithelioma, and malignant trophoblastic tumor. While the disease is uncommon, it is important to seek medical attention if symptoms such as vaginal bleeding, abdominal pain, or high levels of the hCG hormone are present. Early detection and treatment can significantly improve the prognosis for those diagnosed with choriocarcinoma.