In a fetus’ “CHAOS” there is no cosmos, in this disorder exists only one order

Abstract

Congenital high airway obstruction syndrome (CHAOS) is a partial or complete obstruction of the fetal upper airways and is an extremely rare entity. The most common cause of CHAOS is tracheal or laryngeal atresia. Laryngeal agenesis, laryngeal webs or cysts, and even subglottic stenosis can be rare causes. We present the rare case of a large cervical teratoma impinging on the upper airways of a fetus and causing CHAOS.