Ultrasonographic prenatal diagnosis of upper respiratory tract atresia

Congenital laryngeal atresia is a rare malformation generally incompatible with life. 1 To our knowledge, Z:.J antenatal diagnosis has only rarely been described in the literature, and in these cases the diagnosis was not made until after 22 weeks of gestation. This report is of two cases of upper respiratory tract atresia detected at routine sonographic examination at 18 weeks' gestational age.