Pediatric annular pancreas: twenty years' experience.

Characterization of pediatric annular pancreas is provided by this analysis of 24 cases (22 neonates, 1 infant, 1 child). Salient observations include: (1) Presentation is affected by the degree of duodenal obstruction at birth and by coexistent anomalies. (2) Polyhydramnios usually accompanies complete high intestinal obstruction by annular pancreas. (3) Primary biliary interruption was not encountered and jaundice was not unusually prevalent. (4) There is a high incidence of associated anomalies. (5) Duodenal bypass by duodenoenterostomy was employed with excellent results.