Breast cancer develops when abnormal cells in the breast grow uncontrollably and form a tumor. It usually begins in the milk ducts or milk-producing glands. Some cancers remain confined to the breast,
<p>Breast cancer develops when abnormal cells in the breast grow uncontrollably and form a tumor. It usually begins in the milk ducts or milk-producing glands. Some cancers remain confined to the breast, while others may spread to nearby lymph nodes or other organs. Early detection often provides more treatment options.</p>