Background: In utero exposure to carbimazole for maternal hyperthyroidism has been reported to cause choanal atresia. There are case reports of patent vitello-intestinal duct and Meckel's diverticulum in similar association.
Case: We report another such instance of an infant who was exposed to carbimazole in utero, presenting with bilateral choanal atresia and patent vitello-intestinal duct.
Conclusions: As there seems to be no reports of a possible association between propylthiouracil and congenital malformations, it may be safer to use propylthiouracil instead of carbimazole.
(c) 2008 Wiley-Liss, Inc.