Epithelioid trophoblastic tumor（ETT）is a rare tumor which originates from the chorionic intermediate trophoblast.It occurs mostly in women of childbearing age，especially after full-term pregnancy.The clinical manifestation of ETT is similar to that of placental site trophoblastic tumor（PSTT）.About 70% of ETT patients have the complaint of vaginal bleeding，and moderate up-regulation of serum human chorionic gonadotropin （hCG） levels is widely found.Surgery is the preferred option for the treatment of ETT，and the effect of chemotherapy remains controversial.Patients without metastasis have a favourable prognosis，but metastasis comes with a very poor prognosis.