Table 1. Two FIGO staging systems of 2009 and 2018 with modifications ⁵ .

Stage	2009 FIGO staging	2018 (current) FIGO update
I	The carcinoma is strictly confined to the cervix uteri (extension to the corpus should be disregarded).	The carcinoma is strictly confined to the cervix uteri (extension to the corpus should be disregarded) Stage IB has modifications.
IA	Invasive carcinoma that can be diagnosed only by microscopy, with maximum depth of invasion <5 mm.	No change
IA1	Measured stromal invasion ≤3 mm in depth	No change
IA2	Measured stromal invasion >3 mm and <5 mm in depth	No change
IB	Invasive carcinoma with measured deepest invasion >5 mm (greater than stage IA), lesion limited to the cervix uteri, independent of lateral extension.	Invasive carcinoma with measured deepest invasion >5 mm (greater than stage IA), lesion limited to the cervix uteri, independent of lateral extension.
1B1	≤4 cm	Invasive carcinoma >5 mm depth of stromal invasion and ≤2 cm in greatest dimension
1B2	>4 cm	Invasive carcinoma >2 cm and ≤4 cm in greatest dimension
1B3	–	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.	No change
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.	No change
IIB	With parametrial involvement but not up to the pelvic wall.	No change
III	The carcinoma involves the lower third of the vagina and/or extends to the pelvic wall and/or causes hydronephrosis or nonfunctioning Kidney.	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 paraaortic lymph nodes. Stage IIIC has modifications
IIIA	Carcinoma involves the lower third of the vagina, with no extension to the pelvic wall.	No change
IIIB	Extension to the pelvic wall and/or hydronephrosis or nonfunctioning kidney (unless known to be due to another cause).	No change
IIIC	–	Involvement of pelvic and/or paraaortic lymph nodes, irrespective of tumor size and extent (with r and p notations)
IIIC1	–	Pelvic lymph node metastasis only
IIIC2	–	Paraaortic 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.	No change
IVA	Spread of the growth to adjacent organs.	No change
IVB	Spread to distant organs	No change