Breast Cancer - 4 stages
Stage 0: Known as Ductal Carcinoma In Situ (DCIS), the cells are limited to within a duct and have not invaded surrounding tissues.
Stage 1: At the beginning of this stage, the tumor is up to 2 cm across and no lymph node involvement
Stage 2: Size of the tumor is 2 cm across and it has started to spread to nearby nodes.
Stage 3: Size of the tumor is up to 5 cm across and it may have spread to some lymph nodes.
Stage 4: The cancer has spread to distant organs, especially the bones, liver, brain, or lungs (distal metastasis)