. 2021 Oct 20;155(Suppl 1):45–60. doi: 10.1002/ijgo.13866

TABLE 1.

Cancer of the corpus uteri

FIGO stage
I ^a	Tumor confined to the corpus uteri
IA ^a	No or less than half myometrial invasion
IB ^a	Invasion equal to or more than half of the myometrium
II ^a	Tumor invades cervical stroma, but does not extend beyond the uterus ^b
III ^a	Local and/or regional spread of the tumor
IIIA ^a	Tumor invades the serosa of the corpus uteri and/or adnexa ^c
IIIB ^a	Vaginal involvement and/or parametrial involvement ^c
IIIC ^a	Metastases to pelvic and/or para‐aortic lymph nodes ^c
IIIC1 ^a	Positive pelvic nodes
IIIC2 ^a	Positive para‐aortic nodes with or without positive pelvic lymph nodes
IV ^a	Tumor invades bladder and/or bowel mucosa, and/or distant metastases
IVA ^a	Tumor invasion of bladder and/or bowel mucosa
IVB ^a	Distant metastasis, including intra‐abdominal metastases and/or inguinal nodes

^{^a}

Either G1, G2, or G3.

^{^b}

Endocervical glandular involvement only should be considered as Stage I and no longer as Stage II.

^{^c}

Positive cytology has to be reported separately without changing the stage.