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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