National Cancer Institute National Cancer Institute
U.S. National Institutes of Health National Cancer Institute
Dictionary of Cancer Terms
Send to Printer
molar pregnancy (MOH-ler PREG-nun-see)

 A slow-growing tumor that develops from trophoblastic cells (cells that help an embryo attach to the uterus and help form the placenta) after fertilization of an egg by a sperm. A molar pregnancy contains many cysts (sacs of fluid). It is usually benign (not cancer) but it may spread to nearby tissues (invasive mole). It may also become a malignant tumor called choriocarcinoma. Molar pregnancy is the most common type of gestational trophoblastic tumor. Also called hydatidiform mole.

Previous Definitions:modality, modified radical mastectomy, modulate, Mohs micrographic surgery, Mohs surgery
Next Definitions:mold, mole, molecular diagnosis, molecular marker, molecular mass