Breast Cancer Screening is an important part of cancer prevention. Yearly breast cancer screenings such as mammogram, ultrasound, or MRI should be done on all women over the age of 50. Earlier screening is recommended for women who have a family history of breast cancer. Monthly breast exams can help to detect breast and underarm lumps so that they can be examined by a doctor as soon as possible. Genetic testing can also play a role in cancer prevention. Early detection is very important in the war against breast cancer.