FIGO Stage			Description
I			The carcinoma is confined to the cervix.
	IA		Invasive cancer identified only microscopically. (All gross lesions even with superficial invasion are Stage IB cancers.) Invasion is limited to measured stromal invasion with a maximum depth of 5 mm and no wider than 7 mm.
		IA1	Measured invasion of stroma ≤ 3 mm in depth and ≤ 7 mm width
		IA2	Measured invasion of stroma > 3 mm and < 5 mm in depth and ≤ 7 mm width
	IB		Clinical lesions confined to the cervix, or preclinical lesions greater than stage IA
		IB1	Clinical lesions no greater than 4 cm in size
		IB2	Clinical lesions > 4 cm in size
II			The carcinoma extends beyond the uterus, but has not extended onto the pelvic wall or to the lower third of vagina.
	IIA		Involvement of up to the upper two‐thirds of the vagina. No obvious parametrial involvement
		IIA1	Clinically visible lesion ≤ 4 cm
		IIA2	Clinically visible lesion > 4 cm
	IIB		Parametrial involvement, but not onto the pelvic sidewall
III			The carcinoma has extended onto the pelvic sidewall. On rectal examination, there is no cancer free space between the tumour and pelvic sidewall. The tumour involves the lower third of the vagina. All cases of hydronephrosis or non‐functioning kidney should be included unless they are known to be due to other causes.
	IIIA		Involvement of the lower vagina but no extension onto pelvic sidewall
	IIIB		Extension onto the pelvic sidewall, or hydronephrosis/non‐functioning kidney
IV			The carcinoma has extended beyond the true pelvis or has clinically involved the mucosa of the bladder and/or rectum.
	IVA		Spread to adjacent pelvic organs
	IVB		Spread to distant organs