This booklet deals with the subject of cancer of the colon and rectum, Valsrtan which begins in the colon is called colon cancer, and the cancer that begins in the rectum is called rectal cancer, cancer of the members of both the so-called cancer of the colon and rectum. Will read in this booklet for potential risk factors, and investigate the disease, symptoms, diagnosis, treatment, and you will also find a list of questions that you can ask your doctor, and the biggest benefit will be realized when they take this booklet with you at your next visit to the doctor.