DUODENAL ATRESIA IN DIZYGOTIC TWINS

The authors report duodenal atresia occurring in both members of dizyg otic twins who showed no signs of Down's syndrome, and both had normal chromosomal constitutions. They both had the two unlinked end type of atresia in the second portion of the duodenum, and direct end-to-end duodenoduodenostomy was carried out. Their postoperative courses were smooth, and both babies were discharged 32 days after birth. Their mot her underwent pituitary adenoma removal and partial parathyroidectomy for multiple endocrine neoplasia (MEN-type I). She had been given horm onal supplement therapy after surgery and became pregnant after exogen ous gonadotropin therapy. Environmental factors may be responsible for some cases of duodenal atresia. Copyright (C) 1997 by W.B. Saunders C ompany.