A Prospective, Single Blinded Study for Predicting Colon Polyp Histology With Narrow Band Imaging

Inclusion Criteria: * referral for screening or surveillance colonoscopy * the ability to provide informed consent Exclusion Criteria: * prior surgical resection of any portion of colon * prior history of colon cancer * history of inflammatory bowel disease * use of anti-platelet agents or anticoagulants that precludes removal of polyps during the procedure * poor general condition or any other reason to avoid prolonged procedure time * history of polyposis syndrome or Hereditary Non-polyposis colon cancer * inability to give informed consent