NCIt definition : A gestational trophoblastic disorder characterized by marked enlargement of the chorionic
villi, hyperplasia of the villous trophoblastic cells and hydropic changes.;
Alternative definition : NICHD: A placental disorder characterized by abnormal development with marked enlargement
of the chorionic villi and hydropic changes which consist of hyperplasia of the villous
trophoblastic cells.; NCI-GLOSS: 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 hydatidiform mole 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. Hydatidiform mole is
the most common type of gestational trophoblastic tumor.;
ICD-O code : 9100/0;
Codes from synonyms : CDR0000046747; CDR0000446933;