Identical twins with malrotation and type IV jejunal atresia.

Identical twins are reported, who associated with maternal anaphylactic shock at 101/2 weeks gestation, acquired a type IV jejunal atresia with total absorption of the small bowel beyond the third portion of the duodenum and persistence of the most terminal length of ileum in the ileocolic artery in an apple peel configuration. Both infants survived a tapered jejunoileostomy and have undergone a successful transition to a regular diet. This accidental occurrence in two infants at the same time and in an identical fashion is a rare event.