background: gestational trophoblastic disease (gtd) defines a heterogenenous group of interrelated lesions that arise from the trophoblastic epithelium of the placenta. there are several histologically distinct types of gtd: hydatiform mole (complete or partial), persistant/invasive gestational trophoblastic neoplasia (gtn), choriocarcinoma and placenta site trophoblastic tumors. the aim of thi...
