Prenatal diagnosis of congenital high airway obstruction syndrome (CHAOS). Five case report.

Halil Aslan, Ali Ekiz, Deniz Kanber Acar, Burchan Aydiner, Basak Kaya, Salim Sezer


Congenital high airway obstruction syndrome (CHAOS) is an extremely rare life-threatening condition. Laryngeal atresia appears to be the most frequent cause. Generally the diagnosis is made with severely enlarged and highly echogenic lungs and additional ultrasound findings. The prognosis of the affected infants is often poor. Five cases are reported here that were diagnosed in a tertiary center between 2008 and 2014.


congenital high airway obstruction syndrome; laryngeal atresia; ultrasonography

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