Infiltrating or Invasive Ductal Carcinoma

The cancer starts in a milk passage, or duct, of the breast, but then the cancer cells break through the wall of the duct and spread into the surrounding tissue of the breast. Cancer cells can then spread into lymphatic channels or blood vessels of the breast and to other parts of the body (known as “metastasize”). IDC is considered to be the most common type of invasive breast cancers; about 80% of all breast cancers are invasive ductal carcinoma.