Table 1.
Uterine cervical cancer classification system (as proposed by the International Federation of Gynecology and Obstetrics, 2009)
| Stage | Sub-stage | Sub-stage |
| (description) | (description) | (description) |
| In situ | ||
| I | IA | IA1 |
| Tumor confined to the cervix (may extend to the uterine corpus) | Miscroscopic tumor: Depth of invasion ≤ 5 mm, horizontal spread ≤ 7 mm | Depth of invasion ≤ 3 mm, horizontal spread ≤ 7 mm |
| IA2 | ||
| Depth of invasion > 3 mm and ≤ 5 mm, horizontal spread ≤ 7 mm | ||
| IB | IB1 | |
| Macroscopically visible tumor | Lesion of maximal diameter ≤ 4 cm | |
| IB2 | ||
| Lesion of maximal diameter > 4 cm | ||
| II | IIA | IIA1 |
| Cervical carcinoma extends to the upper vagina or parametrium | Cervical cancer extents to the upper 2/3 of the vagina | Lesion of maximal diameter ≤ 4 cm |
| IIA2 | ||
| Lesion of maximal diameter > 4 cm | ||
| IIB | ||
| Tumor invades parametrial space (uni- and/or bilateral) | ||
| III | IIIA | |
| Cervical cancer invades pelvic sidewall and/or lower 1/3 vagina and/or causes hydronephrosis | Tumor invades lower 1/3 of vagina | |
| IIIB | ||
| Tumor invades pelvic wall and/or ureter causing hydronephrosis | ||
| IV | IVA | |
| Cervical cancer invades adjacent pelvic organs and/or extending distally (beyond the pelvis) | Bladder and/or rectal mucosa invasion | |
| IVB | ||
| Distant metastasis, peritoneal or paraaortic node involvement |