Table 2.

FIGO and TNM staging for vaginal cancer with MRI characteristics for each stage

FIGO stage	TNM staging	Tumor size	Lymph node involvement	Organ involvement	Distant metastases	MRI
1	T1a N0 M0	<2 cm	None	Vagina	None	Intact T2-hypointense vaginal wall
	T1b N0 M0	>2 cm	None	Vagina	None
2	T2a N0 M0	<2 cm	None	Invades paravaginal tissue but not to pelvic sidewall	None	Disrupted T2-hypointense vaginal wall
	T2b N0 M0	>2 cm	None	Invades paravaginal tissue but not to pelvic sidewall	None
3	T1, T2, or T3 N1 M0 OR T3 N0 M0	Any size Any size	Inguinal or pelvic nodes None	Invades pelvic sidewall, and/or lower vagina, and/or causing hydronephrosis Invades pelvic sidewall, and/or lower vagina, and/or causing hydronephrosis	None None	Abnormal T2-hyperintense pelvic musculature
4A	T4 Any N M0	Any size	Any N	Bladder, rectum, or extend beyond pelvis	None	Disrupted T2-hypointense bladder or rectal wall; abnormal enhancement of adjacent organs
4B	Any T Any N M1	Any size	Any N	Any T	Yes Lung, liver, or bones	Distant organ metastases (lungs and liver are most common)