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Congenital high airway obstruction syndrome (CHAOS) is a rare congenital anomaly and the most common etiology is laryngeal atresia. Recently, an increasing number of cases have survived due to prenatal diagnosis and pre- and peri-natal care including ex-utero intrapartum treatment (EXIT). More than 100 cases of CHAOS have been reported, and about half of them were complicated with associated anomalies...
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