Endoscopic examinations of hollow organs, similarly as other invasive operations, are associated with a certain percentage of sometimes very serious complications. Iatrogenic perforations of the gut, in particular during the procedure belong to the most dramatic ones. During the period of 1990-2000 the authors had the opportunity to deal in collaboration with the medical department with five cases.

        Key words: endoscopic examination methods - iatrogenic injury of the gut - colonoscopy