| A teratogenic embryofetopathy that results from maternal exposition to methimazole in the first trimester of pregnancy. Methimazole is an antithyroid thionamide drug used for the treatment of Graves' disease. In the infant, methimazole may result in choanal atresia, esophageal atresia, omphalocele, omphalomesenteric duct anomalies, congenital heart disease (such as ventricular septal defect), renal system malformations and aplasia cutis. Additional features that may be observed include facial dysmorphism (short up slanting palpebral fissures, a broad nasal bridge with a small nose and a broad forehead) and athelia. |
