Laboratory evidence that the woman is carrying a specific genetic mutation or change that increases susceptibility to breast cancer. Having a mother, sister, or daughter with a history of breast cancer or having two or more close relatives, such as cousins, with a history of breast cancer. Having so much dense breast tissue on a previous mammographic examination that clear reading was difficult. Having a first birth at age 30 or older.
Breast cancer is more prevalent in older age groups.
The risk of breast cancer increases with age. About 80 percent of breast cancers occur in women age 50 or older. The risk is especially high in women over age 60. Breast cancer is uncommon under age 40. Early Detection Screening is a means to detect breast cancer before the onset of symptoms.