Colorectal Cancer Bowel Cancer Large Intestine Cancer Rectal Cancer Colon Cancer Colorectal Caner, also known as Colon Cancer or Large Intestine Cancer, refers to malignant tumors originating in the large intestine, which extends from the ileocecal valve to and includes the anal canal. This type of cancer can cause symptoms such as changes in bowel habits, rectal bleeding, and abdominal pain, and encompasses various subtypes, including adenocarcinoma, which is the most common form.