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NCI Dictionary of Cancer Terms

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NCI Dictionary of Cancer Terms



stage I cervical cancer  listen  (... SER-vih-kul KAN-ser)

  Cancer is found in the cervix only. Stage I is divided into stages IA and IB, based on the amount of cancer that is found. In stage IA, a very small amount of cancer that can only be seen with a microscope is found in the tissues of the cervix. Stage IA is divided into stages IA1 and IA2, based on the size of the tumor. In stage IA1, the cancer is not more than 3 millimeters deep and not more than 7 millimeters wide. In stage IA2, the cancer is more than 3 but not more than 5 millimeters deep, and not more than 7 millimeters wide. Stage IB is divided into stages IB1 and IB2. In stage IB1, (1) the cancer can only be seen with a microscope and is more than 5 millimeters deep and more than 7 millimeters wide; or (2) the cancer can be seen without a microscope and is 4 centimeters or smaller. In stage IB2, the cancer can be seen without a microscope and is larger than 4 centimeters.

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Stage IA1 and IA2 cervical cancer; drawing shows a cross-section of the cervix and vagina. An inset shows cancer in the cervix that is up to 5 mm deep, but not more than 7 mm wide.
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Stage IB1 and IB2 cervical cancer shown in three cross-section drawings of the cervix and vagina. An inset on the left shows stage IB1 cancer that is 7 mm wide and more than 5 mm deep. Drawing in the middle shows stage IB1 cancer that is smaller than 4 cm. Drawing on the right shows stage IB2 cancer that is larger than 4 cm.