Congenital high airway obstruction syndrome (CHAOS) is an extremely rare and severe life-threatening condition. The term was introduced by Hedrick and colleagues in 1994. It arises due to obstruction in the upper respiratory tract. The obstruction can occur either at the level of larynx or at trachea. The main ultrasonographic findings are enlarged and hyper-echoic lungs, inverted diaphragm, elongated and compressed heart, dilated tracheobronchial tree and ascites which may progress to hydrops. Without antenatal or postnatal treatment, the condition is universally fatal. The risk of recurrence in subsequent pregnancies is low, so antenatal diagnosis can help in counselling the family. Authors describe here, their experience of three cases of CHAOS diagnosed over a period of 5 years. CASE SERIES

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先天性上気道閉塞症候群(Congenital High Airway Obstruction Syndrome:CHAOS)の検討

Citations

Prenatal diagnosis of congenital high airway obstruction syndrome: our experience from a tertiary care center

References

Prenatal diagnosis of congenital high airway obstruction syndrome: our experience from a tertiary care center