Stage I
The cancer has spread from the cervix lining into the deeper tissue but is still just found in the uterus. It has not spread to other parts of the body. This stage may be divided into smaller groups to describe the cancer in more detail (see below).
- Stage IA: The cancer is diagnosed only by viewing cervical tissue or cells under a microscope. Imaging tests or evaluation of tissue samples can also be used to determine tumor size.
- Stage IA1: There is a cancerous area of less than 3 millimeters (mm) in depth.
- Stage IA2: There is a cancerous area 3 mm to less than 5 mm in depth.
- Stage IB: In this stage, the tumor is larger but still only confined to the cervix. There is no distant spread.
- Stage IB1: The tumor is 5 mm or more in-depth and less than 2 centimeters (cm) wide. A centimeter is roughly equal to the width of a standard pen or pencil.
- Stage IB2: The tumor is 5 mm or more in-depth and between 2 and 4 cm wide.
- Stage IB3: The tumor is 4 cm or more in width.
Stage II
The cancer has spread beyond the uterus to nearby areas, such as the vagina or tissue near the cervix, but it is still inside the pelvic area. The cancer has not spread to other parts of the body. This stage may be divided into smaller groups to describe the cancer in more detail (see below).
- Stage IIA: The tumor is limited to the upper two-thirds of the vagina. It has not spread to the tissue next to the cervix, which is called the parametrial area.
- Stage IIA1: The tumor is less than 4 cm wide.
- Stage IIA2: The tumor is 4 cm or more in width.
- Stage IIB: The tumor has spread to the parametrial area. The tumor does not reach the pelvic wall.