Table 1: 1998 FIGO staging system for endometrial cancer.

StageAnatomic involvement

Stage ITumor confined to the uterine corpus
 IA No myometrial invasion
 IB <50% myometrial invasion
 IC ≥50% myometrial invasion
Stage IICervical involvement
 IIA Endocervical glandular involvement
 IIB Cervical stromal invasion
Stage III
 IIIAPositive peritoneal cytology and/or tumor invasion into uterine serosa and/or adnexal involvement
 IIIBVaginal involvement
 IIICMetastases to pelvic and/or pelvic lymph nodes
Stage IV
 IVABladder and/or bowel involvement
 IVBDistant metastases, including abdominal disease and/or inguinal lymph node involvement