Inherited elements that predispose to cancer of the breast. Put otherwise, these genetics make another susceptible to the disease and therefore boost the chance of building breast cancer. Two of the genes, BRCA1 and BRCA2, were identified (and prominently publicized). Other genes (those for the Li-Fraumeni problem, Cowden condition, Muir-Torre problem, and ataxia-telangiectasia) are also known to predispose to cancer of the breast. However, since each one of these known breast cancer susceptibility genes together do not account for above a small fraction (1/5th for the most part) of cancer of the breast that clusters in families, it really is clear that more cancer of the breast genetics continue to be is found.