IA1-stromal invasion ≤3 mm in depth and extension ≤7mm
IA2-stromal invasion >3mm and ≤ 5 mm in depth with horizontal extension ≤7mm
IB1-clinically visible lesions ≤4 cm
IB2-clinically visible lesions > 4 cm
IIA-cervical carcinoma invades beyond the uterus, no parametrial involvement
IIB-cervical carcinoma invades beyond the uterus with parametrial involvement
IIIA-tumor involves lower third of vagina no pelvic sidewall extension
IIIB-extension to pelvic sidewall, hydronephrosis or non-functioning kidney
IVA-carcinoma extends beyond the true pelvis with direct extension to the mucosa of the rectum or bladder
IVB-carcinoma extends beyond the true pelvis with spread the distant organs