Hydatidiform mole: If this happens

If this happens, abnormal cells may grow into the muscle layer around your uterus (also called an invasive mole). This is rare and happens in less than 15% of people who’ve had a molar pregnancy removed. Known for its "grape-like" clusters due to swollen hydropic villi, hydatidiform moles are categorized into 2 types: complete and partial. A complete mole arises when an empty egg is fertilized by 1 or 2 sperm, resulting in a genome with only paternal DNA. Learn about hydatidiform mole, a rare condition where abnormal tissue grows in the uterus instead of a normal placenta. Find out the causes, symptoms, types, risk factors, diagnosis and treatment options for this pregnancy complication. Hydatidiform mole is an abnormal pregnancy characterized by varying degrees of trophoblastic proliferation (both cytotrophoblast and syncytiotrophoblast) and vesicular swelling of placental villi associated with an absent or abnormal fetus/embryo. Two types of hydatidiform mole, complete and partial, have been described based on both morphologic and cytogenetic criteria (Table 1). 1,2 Epidemiology Epidemiologic studies have reported wide regional variations in the incidence of molar ...