Table 1.

1998 FIGO staging system for endometrial cancer.

Stage	Anatomic involvement
Stage I	Tumor confined to the uterine corpus
IA	No myometrial invasion
IB	<50% myometrial invasion
IC	≥50% myometrial invasion
Stage II	Cervical involvement
IIA	Endocervical glandular involvement
IIB	Cervical stromal invasion
Stage III
IIIA	Positive peritoneal cytology and/or tumor invasion into uterine serosa and/or adnexal involvement
IIIB	Vaginal involvement
IIIC	Metastases to pelvic and/or pelvic lymph nodes
Stage IV
IVA	Bladder and/or bowel involvement
IVB	Distant metastases, including abdominal disease and/or inguinal lymph node involvement