Only lung cancer causes more cancer deaths among women. Men can also develop breast cancer, but it is very unusual. About 300 men die each year from the disease. Breast cancer results from malignant tumors which invade and destroy normal tissue. When these tumors break away and spread to other parts of the body, it is called metastasis.
Breast cancers can spread to the lymph nodes, lungs, liver, bone and brain.
Age is the number one risk factor for breast cancer. The risk of developing breast cancer increases dramatically as a woman gets older. Family history of breast cancer, for a woman whose mother, daughter or sister has had the disease. If a lump or other problem is found the doctor can do further exams and tests to check for cancer. There are a variety of treatments for breast cancer.