Breast cancer is one of the most common cancers among women.There are several types of breast cancers. Cancer can arise from any type of cell in the breast. However, most commonly cancer starts in the ducts.
Ductal carcinoma in situ (DCIS): This is the earliest stage of cancer (stage 0). Ductal carcinoma in situ (DCIS) means that the cancer cells are inside the ducts, but have not spread through the walls of the ducts into the surrounding breast tissue. Nearly all women diagnosed at this early stage of breast cancer can be cured. Presently yearly mammography is the best way to find DCIS.
Invasive ductal carcinoma (IDC): This is the most common type of breast cancer. DCIS may progress to this stage if untreated. This cancer starts in a milk duct of the breast, breaks through the wall of the duct, and grows into the fatty tissue of the breast. At this point, it may be able to spread (metastasize) to other parts of the body through the lymphatic system and bloodstream. Even these are curable when detected early (small size).
Invasive lobular carcinoma (ILC): Invasive lobular carcinoma (ILC) starts in the milk-producing glands (lobules). Like IDC, it can spread (metastasize) to other parts of the body. Invasive lobular carcinoma may be harder to detect by a mammogram than invasive ductal carcinoma.