About 5 to 10 percent of all cases of breast cancer are due to an inherited defective gene. This explains why breast cancer may seem to run in some families. Women who have either of these genes have a very high risk for developing breast cancer. Genetic assessment can help determine an individual's risk of carrying a gene linked to breast cancer by tracing her family medical tree and conducting appropriate genetic testing.
Genetic counselors offer guidance on the significance of genetic testing and prevention options.
In some women, a breast mass that cannot be felt is detected on a mammogram. To collect more information, the next step may be to repeat the mammogram with enlarged views of the area. To obtain further information, the doctor may recommend an ultrasound which will reveal more about the characteristics of the mass. Testing may end here if the information collected indicates that the mass is probably noncancerous. If any uncertainty persists, the physician may recommend a stereotactic breast biopsy.