A hydatidiform mole is an abnormal pregnancy, in which there is hyperplastic development of the placenta, which often develops into a mass of small vesicles or cysts. The name “hydatidiform” refers to ...

Gestational trophoblastic disease (GTD) is a rare group of tumors that develop early in pregnancy. It occurs when abnormal cells grow in the "trophoblastic" tissue which typically surrounds the ...