Preduodenal portal vein: a 3-case series demonstrating varied presentations in infants.

Preduodenal portal vein, a rare anomaly, could be found in any age groups. In pediatrics it may present with a duodenal obstruction by itself or other coexisting anomalies; however it usually present with an asymptomatic or incidental findings during other surgery in adults. This anomaly has a clinical importance due to the possibility of accidental damage to portal vein. In addition to describing a series of 3 cases with different manifestation in infants, discuss about this anomaly with a review of relevant literature.