But I am still wondering, how one set of facts regarding LCIS, based on National Center for Biotechnology Information (NCBI) research, can provide a risk of invasive breast cancer of 50%, 60%, 70% over a lifetime (when 2%/year is given) and other reputable sites like American Cancer Society state 20% to maybe 35% lifetime risk? Without accurate information, we cannot make decisions. And 20% compared to 70% is a huge discrepancy.