Individuals with breast cancer are being ascertained from among the patient population at National Naval Medical Center (NNMC) as well as other referring institutions. Individuals from the Clinical Center may also be eligible. There will be three groups of participants, which include a control group, individuals with a documented history of breast cancer, and individuals identified to be at high risk of developing breast cancer. The purpose of the high risk group is to look for potential similarities and differences between the cancer and control populations that may start to be exhibited in the high risk group. This will potentially allow the research team to identify high risk women by markers of risk. After providing informed consent, individuals are asked to donate a blood sample, undergo nipple fluid sampling, and complete epidemiological, dietary and family history questionnaires and grant access to their medical records. The questionnaires will be completed and/or reviewed by the research team.