I cancers survive. Most lumps are found by women themselves. Breast cancer is the leading cause of death in women 35-53. A lump can be detected by a mammogram 3-7 years before it can be felt.
Early detection is the key.
Starting at age 20 a woman should do a self breast exam every month. After age 40 a woman should have a clinical breast exam and a mammogram every year. Your breast tissue begins just below the collar bone down to the bra line, and from the armpit to the breast bone. This entire area needs to be checked monthly. Many women do not feel comfortable doing breast self exams because they do not know what to look for.