Mesenteric vascular occlusion and varices complicating midgut malrotation.

Long-standing complete obstruction of the superior mesenteric artery and vein and recurrent gastrointestinal bleeding from varices within the bowel were encountered in a child as a complication of midgut malrotation and volvulus. This condition is unusual, but should be considered in cases of gastrointestinal bleeding, or when small bowel biopsy is contemplated for the evaluation of diarrhea or malabsorption in cases of malrotation.