Congenital High Airway Obstruction Syndrome (CHAOS)–A Rare Fetal Malformation- Diagnosis on Antenatal Ultrasonography
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چکیده
Congenital high airway obstruction syndrome (CHAOS) is the obstruction of the fetal upper airways, which may be partial or complete. It is important to diagnose it antenatally as it is uniformly lethal and leads to stillbirth or death shortly after delivery. Antenatal diagnosis is made by identifying echogenic and enlarged lungs, dilated bronchi, inverted /flattened diaphragm and ascites on ultrasound. We present a rare case of congenital high airway obstruction, diagnosed on antenatal ultrasonography at 18 weeks of
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Clinical & Medical Imaging Title: Congenital High Airway Obstruction Syndrome (CHAOS) – A Rare Fetal Malformation Diagnosed on Antenatal Ultrasonography
Congenital high airway obstruction syndrome is rare fetal malformation caused by obstruction of fetal airway because of laryngeal or tracheal atresia, subglottic stenosis, laryngeal cyst or laryngeal web. This clinical condition was brought into notice first by Hedrick in the late 1900 [1]. CHAOS is usually caused by atresia or stenosis of the larynx or trachea. The true incidence of CHAOS is u...
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Congenital high airway obstruction (CHAOS) is a rare lethal fetal malformation characterised by obstruction to the fetal upper airway, which can be partial or complete. Antenatal diagnosis of CHAOS is important due to recent management options. Diagnosis is made with secondary changes such as hyperechoic enlarged lungs resulting in mediastinal compression, ascites, hydrops, flattened or everted...
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