Definition

Stage IV colorectal cancer is divided into stages IVA, IVB, and IVC. In stage IVA, cancer has spread to one area or organ that is not near the colon and/or rectum, such as the liver, lung, ovary, or a distant lymph node. In stage IVB, cancer has spread to more than one area or organ that is not near the colon and/or rectum, such as the liver, lung, ovary, or a distant lymph node. In stage IVC, cancer has spread to the tissue that lines the wall of the abdomen and may have spread to other areas or organs.