It is a medical examination that must be carried out to detect alterations or abnormalities in the large intestine, rectum and the end of the small intestine (ileum). On some occasions this test is performed to detect Intestinal Functional Disorders.

It is performed to evaluate the origin of abdominal discomfort, such as constipation, chronic abdominal pain, unexplained weight loss, study of bleeding episodes from the rectum or the appearance of blood in the stool.