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Table 1 TNM (8th Edition) and FIGO (2009) Classification of endometrial cancer (from refs. [30, 31])

From: Role of MRI in staging and follow-up of endometrial and cervical cancer: pitfalls and mimickers

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)
  1. aEndocervical glandular involvement alone should be considered stage I
  2. bPositive cytology must be reported separately without affecting the stage
  3. cThe presence of bullous edema is not sufficient evidence to classify as T4