Breast Cancer Awareness – BRCA1 and BRCA2

Every October is Breast Cancer Awareness Month. One of the leading causes of breast cancer is a genetic mutation in the BRCA1 and BRCA2 human genes. These genes create tumor suppressor proteins that help fix damaged DNA. When either one of these genes is altered or mutated, damage in DNA cannot be properly fixed. This can lead cells to develop additional genetic problems that can lead to cancer.

Inherited BRCA1 and BRCA2 mutations drastically increase the risk of female breast as well as ovarian cancer other cancers such as pancreatic cancer. Angelina Jolie, the famous actress, shed light on the cancer and genetic mutation that affects millions of women. Jolie spoke out about her mother’s death from ovarian cancer and her own discovery of carrying the BRCA1 mutation. This led Jolie to the decision of having a preventative double mastectomy. This preventative treatment is the most important step in preventing breast cancer in women carrying the mutation. Only about 12% of women in the general population will develop breast cancer. However, about 65% of women in the general population carrying the BRCA1 mutation will develop breast cancer as will 45% of women with the BRCA2 mutation in their lifetime.

It is important to know that a child has a 50% chance of getting the mutation from either parent as both men and women can carry the mutation. Men with the BRCA2 mutation have an increased risk of breast cancer as well as prostate cancer. Anyone with a history or breast, ovarian, or prostate cancer in their family is encouraged to consider genetic counseling at the age of 25. The Affordable Care Act in the US considers genetic counseling as well as BRCA1 and BRCA2 mutation testing in those at high risk a covered preventive service.

Those with the mutation can easily manage their risk by yearly screening as well as prophylactic (risk reducing) procedures and chemoprevention. Enhanced screening increases the chance of detection breast cancer in its early stages.

Women with the mutation are also at high risk for ovarian cancer. Unfortunately, no effective ovarian cancer screening methods currently exist. Since there is no way to detect early stage ovarian tumors, many doctors are urging women to undergo prophylactic surgery to remove the ovaries after a women is finished having children. This reduces the chance of a woman from dying from ovarian cancer by about 80%. Hopefully, within the next few years, medical technology with find better ways to detect, treat, and prevent ovarian as well as breast cancer in those carrying the mutations.