For this examination, the doctor or nurse inserts a lubricated gloved finger into the rectum and feels for lumps or abnormal areas. The evidence available does not suggest that digital rectal examination is effective in decreasing mortality from colorectal cancer. Barium Enema - Barium enema is a procedure in which a liquid containing barium is put into the rectum and colon by way of the anus. Barium enema may be effective in detecting large polyps. If the doctor sees polyps or other abnormal tissue during the procedure, they can be removed and further examined under a microscope.
Studies suggest that colonoscopy is a more effective screening method than barium enema.
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