IRB 00006477.

The participation rates were similar for sigmoidoscopy and FOBT. The detection rate for advanced neoplasia was three times higher following screening by sigmoidoscopy than by FOBT.

Even though push-type enteroscope exploration is restricted to the jejunum, the instruments are safe and efficacious in clinical practice, and permit indepth study of small bowel anatomy and pathology.

Different diagnostic techniques for massive active lower gastrointestinal hemorrhage are reviewed. According to data in the literature and personal experience in 409 emergency endoscopic examinations of the large bowel, emergency colonoscopy is a valuable diagnostic tool in cases of massive colorectal bleeding.