Breast disorders may be noncancerous (benign) or cancerous (malignant). Most are noncancerous and not life threatening. Often, they do not require treatment. In contrast, breast cancer can mean loss of a breast or of life. Thus, for many women, breast cancer is their worst fear. However, potential problems can often be detected early when women regularly examine their breasts themselves, are examined regularly by their doctor, and have mammograms as recommended. Early detection of breast cancer can be essential to successful treatment.