FIGO Stage | Tumour invasion | MR imaging findings |
---|---|---|
I | Tumour confined to uterus | |
IA | ≤50 % of myometrium | Abnormal SI in endometrial cavity or confined to inner half of myometrium |
IB | >50 % of myometrium | Extends into the outer half of myometrium |
II | Cervical stromal invasion, but not extension beyond uterus | Disruption or focal thinning of cervical stroma |
III | Local or regional spread | |
IIIA | Serosa of uterus and/or adnexa | Disruption or irregular uterine contour caused by tumour; ovarian nodular tumour |
IIIB | Vagina or parametria | Direct tumour extension of upper vagina or/and parametrial tissues |
IIIC | Metastases to pelvic and/or paraaortic lymph nodes | |
IIIC1 | Pelvic nodes | Lymph nodes >8 mm in short axis |
IIIC2 | Paraaortic nodes w/wo pelvic nodes | Lymph nodes >10 mm in short axis |
IV | Bladder/bowel mucosa; or distant metastases | |
IVA | Bladder/bowel mucosa | Tumour disrupts bladder or bowel muscle and invades mucosa; not bullous edema |
IVB | Metastases abdominal and extraabdominal; inguinal lymph nodes | Tumour deposits at distal sites including peritoneal mets, bladder, bone liver mets, and distal lymph node metastases |