Malrotation - the ubiquitous anomaly.

Although anomalies of rotation and fixation of the gastrointestinal tract are recognized to be associated frequently with anomalies of the abdominal wall and diaphragmatic hernia, the frequency with which these common anomalies are associated with other congenital and acquired lesions of the gastrointestinal tract has not been sufficiently emphasized. Sixty-two percent of our series of 34 patients were associated with such lesions as upper gastrointestinal atresias and stenoses, intussusception, and Hirschsprung's disease. The embryologic and anatomic features of rotational anomalies, their clinical presentation, and radiologic features are presented with the suggestion that knowledge of this information, along with the appreciation of the frequent association of malrotation with other common congenital and acquired abnormalities, will help to prevent the devastating morbidity and mortality of undiagnosed midgut volvulus.