Source:http://linkedlifedata.com/resource/umls/id/C0278575
NCI: 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. The cancer is not deeper than 5 millimeters and not wider than 7 millimeters. In stage IB, the cancer is still within the cervix and either (1) can only be seen with a microscope and is deeper than 5 millimeters or wider than 7 millimeters; or (2) can be seen without a microscope and may be larger than 4 centimeters.,NCI: Stage I includes: I (T1, N0, M0); IA (T1a, N0, M0); IA1 (T1a1, N0, M0); IA2 (T1a2, N0, M0); IB (T1b, N0, M0); IB1(T1b1, N0, M0); IB2 (T1b2, N0, M0). T1: Cervical carcinoma confined to uterus (extension to corpus should be disregarded). T1a: Invasive carcinoma diagnosed only by microscopy. Stromal invasion with a maximum depth of 5.0 mm measured from the base of the epithelium and a horizontal spread of 7.0 mm or less. Vascular space involvement,