RT Book, Section A1 Sylvester, Robert K. A1 Narveson, Lisa A2 Sutton, S. Scott SR Print(0) ID 1179733677 T1 Breast Cancer T2 McGraw Hill’s NAPLEX® Review Guide, 4e YR 2020 FD 2020 PB McGraw-Hill Education PP New York, NY SN 9781264258062 LK accesspharmacy.mhmedical.com/content.aspx?aid=1179733677 RD 2024/04/18 AB Mutations of genes controlling cell proliferation and apoptosis are the primary cause of neoplastic disease and specific gene mutations (BRCA1, BRCA2, p53, PTEN) have been identified in breast cancer. Women with mutations in the tumor suppressor genes BRCA1 and BRCA2 have a four- to fivefold increased risk for the development of breast cancer (approximate lifetime risk increases from 12% to 45%-65%). In addition, family history, prolonged exposure to estrogen (early menarche, nulliparity, late first pregnancy, late menopause) and age over 40 have been established as risk factors for breast cancer.