Harvard University conducted a study of 600 women under the age of 40, finding at least half of early-onset breast cancer resulted in early mortalities. In terms of early diagnostic service for young women under age 40, I addressed this in my dissertation research related to the pros and cons of the recommendations of the United States Preventative Service Task Force. The attached article examines research conducted by Harvard University in young women under age 40. The critical issue relates to a standard needs to be established for young women related to breast cancer.
http://healthland.time.com/2013/09/09/study-more-breast-cancer-deaths-occuring-in-younger-unscreened-women/