Table 2. FIGO clinical staging for uterine cervix (2008).
| 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 deepest invasion ≤5 mm and largest extension ≤7 mm | ||
| IA1 | Measured stromal invasion ≤3 mm in depth and extension of ≤7 mm | ||
| IA2 | Measured stromal invasion >3 mm and not >5 mm with an extension of not >7 mm | ||
| IB | Clinically visible lesions limited to the cervix uteri or pre-clinical cancers greater than stage IA* | ||
| IB1 | Clinically visible lesion ≤4 cm in greatest dimension | ||
| IB2 | Clinically visible lesion >4 cm in greatest dimension | ||
| Stage II | Cervical carcinoma invades beyond the uterus, but not to the pelvic wall or to the lower third of the vagina | ||
| IIA | Without parametrial invasion | ||
| IIA1 | Clinically visible lesion ≤4 cm in greatest dimension | ||
| IIA2 | Clinically visible lesion >4 cm in greatest dimension | ||
| IIB | With obvious parametrial invasion | ||
| Stage III | The tumor extends to the pelvic wall and/or involves lower third of the vagina and/or causes hydronephrosis or non-functioning kidney† | ||
| IIIA | Tumor involves lower third of the vagina, with no extension to the pelvic wall | ||
| IIIB | Extension to the pelvic wall and/or hydronephrosis or non-functioning kidney | ||
| 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 of the growth to adjacent organs | ||
| IVB | Spread to distant organs | ||
FIGO, Fédération Internationale de Gynécologie et d'Obstétrique.
*All macroscopically visible lesions—even with superficial invasion—are allotted to stage IB carcinomas. Invasion is limited to a measured stromal invasion with a maximal depth of 5.00 mm and a horizontal extension of ≤7.00 mm. The depth of invasion should not be >5.00 mm taken from the base of the epithelium of the original tissue—superficial or glandular. The depth of invasion should always be reported in mm, even in those cases with “early (minimal) stromal invasion” (–1 mm). The involvement of vascular/lymphatic spaces should not change the stage allotment. †On rectal examination, there is no cancer-free space between the tumor and the pelvic wall. All cases with hydronephrosis or non-functioning kidney are included, unless they are known to be due to another cause.