[Annular pancreas and neonatal duodenal occlusion. Presentation of 3 cases].

The authors report 3 cases of anular pancreas and consider the main clinical and differential diagnosis aspects of them. Afterwards they dwell upon the etiopathogenesis of this congenital malformation that is consequent not only upon extrinsic pancreatic compression but also upon a contemporary atresia or stenosis of duodenum. That however conditions the management; it will be apply to remove also the intrinsic obstruction of stenotic intestinal segment.