What to a Breast Cancer

Breast cancer is a disease in which malignant (cancer) cells form in the tissues of the breast.

Risk factors for breast cancer include:

* Age: The risk of breast cancer increases with age.

* Personal history of breast cancer: Women who have had breast cancer in one breast are at an increased risk of developing breast cancer in the other breast.

* Family history of breast cancer: Women who have a mother, sister, or daughter who has had breast cancer are at an increased risk of developing breast cancer.

* Genetic mutations: Some gene mutations, such as those in the BRCA1 and BRCA2 genes, can increase the risk of breast cancer.

* Breast density: Women with dense breasts have a higher risk of breast cancer.

* Obese: Obese women have a higher risk of developing premenopausal breast cancer, and some of these cases seem to be associated with higher levels of insulin.

* Exposure to radiation: Women who have had radiation therapy to the chest are at an increased risk of developing breast cancer.

* Hormone replacement therapy (HRT): Some types of HRT, such as those that combine estrogen and progesterone, can increase the risk of breast cancer.

Symptoms of breast cancer can include:

* A lump in the breast or underarm

* Changes in the size, shape, or appearance of the breast

* Dimpling or puckering of the skin of the breast

* A nipple that turns inward or becomes painful

* Discharge from the nipple, other than breast milk

* Redness, scaliness, or thickening of the nipple or breast skin

* Pain in the breast or underarm

If you experience any of these symptoms, it is important to see your doctor right away. Early detection and treatment of breast cancer can improve your chances of survival.

Breast cancer is the most common cancer among women in the United States, but it is also one of the most treatable. With early detection and treatment, many women with breast cancer can go on to live long, healthy lives.