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UPDATE 3/13/2015: Watch the updated version of this animation here: This 3D medical animation shows the placement of an endoscope in the large colon (bowel) during a colonoscopy procedure to screen for polyps and colorectal cancer. During a colonoscopy or a sigmoidoscopy, a biopsy is sometimes preformed to distinguish between benign and cancerous tissue. If polyps are found during the colonoscopy a polypectomy is generally performed. ANCE00175
