Table 1

	TMN stage			Primary tumor definition
FIGO stage	Primary tumor	Regional lymph nodes	Distant metastasis	FIGO definition	MRI definition
I	T1	N0	M0	Tumor confined to Vagina, ≤2 cm	Tumor limited to the vaginal wall, shown as an uninterrupted T2-hypointense sub-mucosal layer
II	T2	N0	M0	Tumor invades Paravaginal tissue But not the pelvis wall ≤2 cm	Tumor extends into the paravaginal space or fat, shown as interrupted, hypo-intense vaginal mucosal and muscular layer
III	T3	N0	M0	Tumor extends to Pelvic wall and is any Size and/or hydronephrosis	Tumor invasion of iliac vessels, pelvic muscle, (eg, obturator internus piriformis, and levator ani) or bony structures
III	T1, T2, T3	N1	M0	Tumor extends to Pelvic wall and is any Size and/or Hydronephrosis and spread In the pelvis or groin
IVA	Any T	Any N	M0	Tumor invades bladder or rectum or Extends beyond pelvis	Tumor invades the adjacent organs involving the mucosal layer of the bladder, rectum, or urethra, or extends beyond the true pelvis
IVB	Any T	Any N	M1

FIGO, International Federation of Gynecology and Obstetrics; M1, distant metastasis; M, metastasis; M0, no distant metastasis; N0, no regional lymph node metastasis; N1, regional lymph node metastasis; N, lymph node; T, tumor; TNM, tumor, node and metastasis.