Stage 1 highly treatable stage 0 National Breast Cancer Foundation National Breast Cancer Foundation Stages 0 & 1 Stage 1A invasive breast cancer lobular carcinoma in situ (LCIS) stage 1 breast cancer is 100% stage 1 breast cancer is 100% stage 1 breast cancer is 100% National Breast Cancer Foundation are more than good carcinoma in situ stage zero breast cancer lobular carcinoma in situ (LCIS) Stages 0 & 1 lobular carcinoma in situ (LCIS) DCIS Stage 1A Breast Cancer Stages 0 & 1