Table 1 Surgical staging of cervical cancer (2018)

I

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

 I A

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

 I A1

Measured stromal invasion < 3 mm in depth

 I A2

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

 I B

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

 I B1

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

 I B2

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

 I B3

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

 II A

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

II a1 Invasive carcinoma < 4 cm in greatest dimension

II a2 Invasive carcinoma ≥ 4 cm in greatest dimension

 II B

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 node

 III A

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

 III B

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

 III C

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

 III C1

Pelvic lymph node metastasis only

 III C2

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)

 IV A

Spread to adjacent pelvic organs

 IV B

Spread to distant organs