Abstract
The authors experienced 3 cases of enterobiasis of the large bowel. In all, Enterobius worms were detected during sigmoidoscopy for colorectal cancer screening in a health care examination. One patient had perianal itching without abdominal symptoms and the other two patients had no symptoms. In one patient worm was found in the rectum and in two, worms in the sigmoid colon. Colonoscopy showed no mucosal lesions in the lumen. It is considered to be rare that Enterobius is found during colonoscopy. Recently in Japan, however, some reports of endoscopically diagnosed Enterobius have been appearing, particularly with the spread of colonoscopy. Enterobiasis is not rare and not stamped out disease. Therefore, enterobiasis should be taken into consideration when colonoscopy detected a semitransparent white worm like but smaller than Anisakis.
