Overview of Congenital Gastrointestinal Anomalies By William J Cochran, MD, Geisinger Clinic Reviewed / Revised Apr 2021 | Modified Sep 2022 View Patient Education High Alimentary Tract Obstruction Jejunoileal and Large-Bowel Obstruction Defects in Abdominal Wall Closure Most congenital gastrointestinal (GI) anomalies result in some type of intestinal obstruction, frequently manifesting with feeding difficulties, distention, and emesis at birth or within 1 or 2 days.