Original sentence: Colorectal cancer is clinically distinct from anal cancer, which affects the anus.Colorectal cancer, less formally known as bowel cancer, is a cancer characterized by neoplasia in the colon, rectum, or vermiform appendix.Colorectal cancers start in the lining of the bowel.Most begin as a small growth on the bowel wall: a colorectal polyp or adenoma
Edited sentence: Bowel cancers start in the innermost layer - the lining of the bowel.Colorectal cancer, commonly known as bowel cancer, includes cancerous growths in the colon, rectum, appendix and depending on the definition used can include those found in the anus as well.Most begin as a small growth on the bowel wall called a polyp or adenoma.The differences in survival by stage highlight the importance of public awareness of the signs and symptoms of bowel cancer and underlie the establishment of bowel cancer screening programmes being established in some countries, such as the programme that has been rolled out in England