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Stage I cervical cancer
Pronunciation
Definition 1
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. (NCI Dictionary)
Definition 2
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, venous or lymphatic, does not affect classification. T1a1: Measured stromal invasion 3.0 mm or less in depth and 7.0 or less horizontal spread. T1a2: Measured stromal invasion more than 3.0mm and not more than 5.0 mm with a horizontal spread 7.0mm or less. T1b: Clinically visible lesion confined to the cervix or microscopic lesion greater than T1a/IA2. T1b1: Clinically visible lesion 4.0 cm or less in greatest dimension. T1b2: Clinically visible lesion more than 4.0 cm in greatest dimension. N0: No regional lymph node metastasis. M0: No distant metastasis. (AJCC 6th and 7th eds.) (NCI Thesaurus)
Definition 3
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 Dictionary)
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