Table 1.

TNM (8th Edition) and FIGO (2009) Classification of endometrial cancer (from refs. [30, 31])

TNM	FIGO	Description
Tx		Primary tumor cannot be assessed
T0		No evidence of primary tumor
T1	Ia	Tumor confined to the corpus uteria
T1a	IAa	Tumor limited to the endometrium or invading less than half of the myometrium
T1b	IB	Tumor invades one half or more of the myometrium
T2	II	Tumor invades cervical stroma, but does not extend beyond the uterus
T3	III	Local and/or regional spread
T3a	IIIa	Tumor invades the serosa of the corpus uteri or adnexa (direct extension or metastasis)
T3b	IIIb	Vaginal or parametrial involvement (direct extension or metastasis)
N1, N2	IIIC	Metastasis to pelvic or paraaortic lymph nodesb
N1	IIIC1	Metastasis to pelvic lymph nodes
N2	IIIC2	Metastasis to paraaortic lymph nodes with/without metastasis to pelvic lymph nodes
T4c	IVA	Tumor invades bladder/bowel mucosa
M1	IVB	Distant metastasis (excluding metastasis to vagina, pelvic serosa, or adnexa) (including metastasis to inguinal lymph nodes, intra-abdominal lymph nodes other than paraaortic or pelvic nodes)

^aEndocervical glandular involvement alone should be considered stage I

^bPositive cytology must be reported separately without affecting the stage

^cThe presence of bullous edema is not sufficient evidence to classify as T4