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 2/3 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 or rectum, or both
IVA	Spread to adjacent pelvic organs
IVB	Spread to distant organs