Cancer - Oncology

What is Breast Cancer?

Breast cancer occurs when cancer cells grow in the breast tissue, and the cells in the body divide without any control or order, eventually forming a growth or a tumor. In some cases, malignant growths can invade nearby tissues, including the lymph nodes, which are in the armpit, above the collarbone, and in the chest. At this point, the cancer can spread to other parts of the body.

A normal breast consists of glandular tissue called lobes, sectioned off into lobules, which produce milk carried to the nipple by small ducts. Fatty and connective tissue as well as blood and lymph vessels surround all the tissue.

While breast cancer is the most common cancer among women in the United States, in rare cases, breast cancer can also occur in men.