Situs inversus abdominus in association with congenital duodenal obstruction: a report of two cases and review of the literature.

This report describes two newborns with persistent bile-stained vomiting. Their radiological investigations revealed the existence of situs inversus and duodenal obstruction. In one, the duodenal obstruction was partial, secondary to a duodenal diaphragm with a central aperture, whereas the other child had complete duodenal atresia as well as Fallot's tetralogy. Such an association is extremely rare, with only 18 cases reported so far in the literature. Embryological aspects, investigations, and treatment are also discussed.