NCIt synonyms : Breast Cancer Stage I AJCC v6; Stage I Breast Carcinoma AJCC v6; Breast Carcinoma Stage I AJCC v6;
NCIt related terms : Stage I Breast Cancer;
NCIt definition : Stage 1 includes T1, NO, MO. T1: Tumor 2.0 cm or less in greatest dimension. T1mic:
Microinvasion 0.1 cm or less in greatest dimension. N0: No regional lymph node metastasis.
M0: No distant metastasis. (AJCC 6th Ed.)-2003;
Alternative definition : NCI-GLOSS: Stage I breast cancer is divided into stages IA and IB. In stage IA, the
tumor is 2 centimeters or smaller and has not spread outside the breast. In stage
IB, (1) no tumor is found in the breast, but small clusters of cancer cells (larger
than 0.2 millimeter but not larger than 2 millimeters) are found in the lymph nodes;
or (2) the tumor is 2 centimeters or smaller and small clusters of cancer cells (larger
than 0.2 millimeter but not larger than 2 millimeters) are found in the lymph nodes.;