Overview Double Bubble Sign due to duodenal atresia Developmental derivatives login to view 3 more bullets GI embryologic timeline login to view 5 more bullets Pathology Anterior abdominal wall defects due to failure of login to view 10 more bullets Duodenal atresia login to view 4 more bullets Jejunal, ileal, and colonic atresia login to view 2 more bullets Congenital pyloric stenosis login to view 6 more bullets Pancreas divisum- failed fusion of the ventral and dorsal pancreatic buds