A polyp is a benign tumor that grows inward from the wall of the colon or rectum. On the other hand, malignant tumors invade and damage nearby tissues and organs. They also can break way and travel through the blood and lymphatic system to distant parts of the body, a process call metastasis. Most health problems respond best to treatment when they are diagnosed and treated as early as possible. This is especially true for colorectal cancer.
Treatment is most effective before the disease spreads.
For this exam, the doctor inserts a lubricated, gloved finger into the rectum and feels for abnormal areas. Beginning at age 50, have an annual fecal occult blood test. A small amount of stool is placed on a plastic slide or on special paper. The stool may be tested in the doctor's office or sent to a lab. The test is done because colorectal cancer may cause bleeding that cannot be seen.