Stage 1A1 Measured invasion of cervical tissue no greater than 3 mm in depth and no wider than 7 mm. Measured invasion of cervical tissue greater than 3 mm and no greater than 5 mm in depth and no wider than 7 mm. Clinical lesions no greater than 4 cm. Clinical lesions greater than 4 cm. The cancer has spread to the upper part of the vagina, but there is no obvious parametrial involvement.
Parametrial tissue is the tissue that surrounds the cervix.
Stage 2B Obvious parametrial involvement. The cancer has extended onto the pelvic wall or to the lower third of the vagina. No extension onto the pelvic wall, but involvement of the lower third of the vagina Stage 3B Extension onto the pelvic wall or blocked urine flow. Stage 4 The cancer has extended beyond the true pelvis or has clinically involved the mucosa of the bladder or rectum. Stage 4A Spread of the growth to adjacent organs.