You will notice that within each stage is a "sub-stage" and represent levels within that specific stage of cancer.
The staging system begins at 0 and ends at IV. 0 meaning the very early stages of cancer and IV being advanced.
Also called carcinoma in situ, stage 0 means that cancerous cells that have not invaded deeper tissues. The cells are superficial and are only found on the surface.
In stage I, cancerous cells have invaded the cervix, and cells are no longer just at the surface. Cancer is still confined to the cervix and has not spread.
- Stage IA1: The invasion area is less than 3mm(1/8 inch) deep and less than 7mm (1/4 inch) wide.
- Stage IA2: The invasion area is between 3 mm and 5 mm (about 1/5 inch) deep and less than 7 mm (about 1/4 inch) wide.
- Stage IB1: Cancer is no more than 4 centimeters large (1 3/4 inches).
- Stage IB2: Cancer is larger than 4 centimeters (1 3/4 inches)
In stage II, the cancer has spread to nearby tissues, but is still contained within the pelvic area.
This stage indicates that cancer has spread to the lower portion of the vagina. It could have also spread to the pelvic wall in this stage.
In stage IV, the cancer has spread to other areas of the body. This is the most advanced stage of cervical cancer.