The estimated number of cases of invasive breast cancer in 2006 exceeded 214,000; nearly 40,000 will die each year from the disease. The vast majority of patients are women, although 1,700 men will be affected. Factors associated with increased risk include increasing age, early onset menarche, late menopause, nulliparity, late first pregnancy, and family history of breast and/or ovarian cancer. The genetic predisposition to breast cancer through the BRCA 1 or 2 mutations account for nearly 7% of the cases of breast cancer in the United States. The median age at diagnosis is 61.
KeywordsBreast Cancer Sentinel Node Sentinel Lymph Node Biopsy Invasive Breast Cancer Aromatase Inhibitor
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