Stage I Breast Cancer

In stage I, cancer is present in the breast tissue, but has not yet spread to other areas of the body. This stage is divided into stage IA and stage IB.

Stage IA breast cancer is characterized by a small tumor, no larger than two centimeters. At this point, cancerous cells have not entered the lymph nodes.

Stage IB breast cancer is characterized by cancerous cells in the lymph nodes. In this stage, either no tumor will be present, or only a small tumor no larger than two centimeters will be present.

Breast cancer is highly treatable when detected in stage I, with a five-year survival rate close to 100 percent.