Abstract
An obstruction of the fetal upper airway in utero due to various reasons may cause a fatal condition congenital high airway obstruction syndrome (CHAOS). The prenatal ultrasound fi ndings of CHAOS include large echogenic lungs, fl attened or inverted diaphragms, dilated airways distal to the obstruction, and fetal ascites and/or hydrops [1]. If it is associated with severe hydrops and/ or associated anomalies, its prognosis is fatal. Here we present a case of antenatally diagnosed CHAOS with associated anomalies and a literature review.
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