What are the types of gestational trophoblastic disease?
GTD tumors are grouped into two types: hydatidiform moles and gestational trophoblastic neoplasia.
Hydatidiform moles (HMs) are generally noncancerous, but some forms can be precancerous. HMs are much more common than gestational trophoblastic neoplasia (GTN). HMs are slow-growing tumors that are sometimes called a molar pregnancy. Types of HMs include:
- Complete hydatidiform moles (complete HM)
- Partial hydatidiform moles (partial HM)
Gestational trophoblastic neoplasia (GTN) tumors are almost always cancerous. Types of GTN include:
- Placental-site trophoblastic tumors (PSTT)
- Epithelioid trophoblastic tumors (ETT)