Colorectal cancer

Overview

Colorectal cancer affects the colon or rectum, located at the lower end of the digestive tract.

Symptoms

Symptoms may vary depending on the cancer's size and location. Symptoms might include blood in the stool, abdominal discomfort, and a change in bowel habits, such as diarrhea or constipation.

Treatments

Most cases begin as noncancerous growths called polyps. Removing polyps can prevent cancer, so health care providers recommend screenings for those at high risk or over the age of 45.