Breast cancer is the most common cancer in American women, except for skin cancers. It is estimated that in 2021, approximately 30% of all new women cancer diagnoses will be breast cancer. In 2021, an estimated 281,550 new cases of invasive breast cancer will be diagnosed in women in the U.S. as well as 49,290 new cases of non-invasive (in situ) breast cancer.
There are 2 main types of breast cancer:
- Ductal carcinoma starts in the tubes (ducts) that carry milk from the breast to the nipple. Most breast cancers are of this type.
- Lobular carcinoma starts in the parts of the breast, called lobules, which produce milk.
In rare cases, breast cancer can start in other areas of the breast.
October is Breast Cancer Awareness Month, marked in countries across the world, helps to increase attention and support for the awareness, early detection and treatment as well as palliative care of this disease.