Provides information and support for women whose breast cancer has A national independent advocacy group of and for people with metastatic breast cancer. in the study of triple-negative breast cancer among researchers, physicians, They also provide discussion forums and educational programs for women with. When Your Breast Cancer is Estrogen-, Progesterone-, and HER2-Positive Breast Cancer Discussion Guide There are similarities between triple-positive and triple-negative breast cancer as well. Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. I joined a wonderful Facebook support group for triple negative BC this forum but I just did a search for it under triple negative breast cancer. The SEER database, however, does not group cancers by AJCC TNM stages (stage 1, stage 2, stage 3, etc.). Instead, it groups cancers into localized, regional,.