FIGO staging of cancer of the cervix uteri (2018).

Stage Description

I The carcinoma is strictly confined to the cervix (extension to the uterine corpus should be disregarded)

IA Invasive carcinoma that can be diagnosed only by microscopy, with maximum depth of invasion <5 mm

IA1 Measured stromal invasion <3 mm in depth

IA2 Measured stromal invasion ≥3 mm and <5 mm in depth

IB Invasive carcinoma with measured deepest invasion ≥5 mm (greater than Stage IA), lesion limited to the cervix uteri

IB1 Invasive carcinoma ≥5 mm depth of stromal invasion, and <2 cm in greatest dimension

IB2 Invasive carcinoma ≥2 cm and <4 cm in greatest dimension

IB3 Invasive carcinoma ≥4 cm in greatest dimension

II The carcinoma invades beyond the uterus, but has not extended onto the lower third of the vagina or to the pelvic wall

IIA Involvement limited to the upper two-thirds of the vagina without parametrial involvement

IIA1 Invasive carcinoma <4 cm in greatest dimension

IIA2 Invasive carcinoma ≥4 cm in greatest dimension

IIB With parametrial involvement but not up to the pelvic wall

III The carcinoma involves the lower third of the vagina and/or extends to the pelvic wall and/or causes hydronephrosis or nonfunctioning kidney and/or involves pelvic and/or para-aortic lymph nodes

IIIA The carcinoma involves the lower third of the vagina, with no extension to the pelvic wall

IIIB Extension to the pelvic wall and/or hydronephrosis or nonfunctioning kidney (unless known to be due to another cause)

IIIC Involvement of pelvic and/or para-aortic lymph nodes, irrespective of tumor size and extent (with radiology and pathology notations)

IIIC1 Pelvic lymph node metastasis only

IIIC2 Para-aortic lymph node metastasis

IV The carcinoma has extended beyond the true pelvis or has involved (biopsy proven) the mucosa of the bladder or rectum. (A bullous edema, as such, does not permit a case to be allotted to Stage IV)

IVA Spread to adjacent pelvic organs

IVB Spread to distant organs