Table 2. Cervical cancer staging based on FIGO 2018 guidelines.
| Stage | Definition |
| FIGO, the International Federation of Gynecology and Obstetrics. | |
| Stage I | The carcinoma is strictly confined to the cervix (extension to the corpus would be disregarded). |
| IA | Invasive carcinoma which 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); lesions limited to the cervix uteri with size measured by maximum tumor diameter |
| 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 |
|
| Stage II | The cervical carcinoma invades beyond the uterus, but has not extended to the lower third of the vagina or the pelvic wall |
| IIA | Involvement limited to the upper two-thirds of the vagina without parametrial invasion |
| IIA1: Invasive carcinoma ≤4 cm in greatest dimension | |
| IIA2: Invasive carcinoma >4 cm in greatest dimension | |
| IIB | With parametrial invasion but not up to the pelvic wall |
| Stage III | The carcinoma involves the lower third of the vagina and/or extends to the pelvic wall and/or causes hydro-nephrosis or non-functioning kidney and/or involves pelvic and/or para-aortic lymph nodes |
| IIIA | Carcinoma involves lower third of the vagina, with no extension to the pelvic wall |
| IIIB | Extension to the pelvic wall and/or hydro-nephrosis or non-functioning kidney (unless known to be due to another cause) |
| IIIC | Involvement of pelvic and/or para-aortic lymph nodes (including micro-metastases), irrespective of tumor size and extent (with r and p notations).
IIIC1: Pelvic lymph node metastasis only IIIC2: Para-aortic lymph node metastasis |
| Stage 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 organs |
| IVB | Spread to distant organs |