Cancer of the colon or rectum is often called colorectal cancer. The colon and the rectum are part of the large intestine, which is part of the digestive system. Tumors found in the colon or rectum may be benign (noncancerous) growths of tissue (polyps) or malignant cancerous growths of tissue that may spread to other parts of the body.

An anal fissure is an unnatural crack or tear in the skin of the anal canal. Anal fissures may be noticed by bright red anal bleeding on the ...