Peyer patches are generally found in the ileum and Brunner glands are typically found in the duodenum, although they can be found in other places throughout the gastrointestinal tract. Meckel diverticula are classically found in the ileum as a persistence of the embryonic vitelline (omphalomesenteric) duct. ey aect 2% of the population, are usually located 2 feet from the ileocaecal valve, are 2 inches in length and involve two types of ectopic tissue (gastric and pancreatic). Patients oen present at 2 years of age and males are twice as likely to be aected. Valvulae conniventes (also known as circular folds, plicae circulares or valves of Kerckring) are largest in the proximal half of the jejunum.