Table 2 FIGO staging of endometrial carcinoma and corresponding MR findings (revised 2009)

Stage I^a

Tumour confined to the corpus uteri

 IA

Tumour extending to <50% of myometrial depth

Signal intensity of tumour extends into <50% of myometrium. Partial or full thickness disruption of the junctional zone

 IB

Tumour extending to >50% of myometrial depth

Signal intensity of tumour extends into >50% of myometrium. Full thickness disruption of the junctional zone

Stage II^a

Tumour invades cervical stroma, but does not extend beyond the Uterus

Internal os and endo-cervical canal are widened. Disruption of low signal stroma

Stage III^a

Local and/or regional spread of the tumour

 IIIA

Tumour invades the serosa of the corpus uteri and/or adenexae

Disruption of continuity of outer myometrium. Irregular uterine configuration

 IIIB

Vaginal and/or parametrial involvement

Segmental loss of hypointense vaginal wall

 IIIC

Metastases to pelvic and/or para-aortic lymph nodes

Regional or para-aortic nodes >1 cm in short axis diameter

 IIIC1

Positive pelvic nodes

 IIIC2

Positive para-aortic lymph nodes ± positive pelvic lymph nodes

Stage IV^a

Tumour invades bladder and/or bowel mucosa, and/or distant metastases

 IVA

Tumour invasion of bladder and/or bowel mucosa

Tumour nodules protruding in the bladder/rectal lumen

 IVB

Distant metastases, including intra-abdominal metastases and/or inguinal lymph nodes

Tumour in distant sites or organs