CONGENITAL HIGH AIRWAY OBSTRUCTION SEQUENCE (CHAOS) DIAGNOSED AT 21 WEEKS OF GESTATION WITH NORMAL LUNG APPEARANCE AT 12 WEEKS

Problemstellung: Congenital high airway obstruction sequence (CHAOS) is a rare condition of obstruction of the trachea or larynx leading to fluid accumulation in the fetal lungs with enlargement of the lungs and as consequence fetal ascites, eventually fetal hydrops and fetal death. We present a case of CHAOS diagnosed at 21 weeks of gestation with well documented normal early screening at 12 weeks. Methoden: Case report: A 33 year old gravida II, para I presented at 21 weeks of gestation for screening ultrasound. The course of pregnancy was uneventful and an early screening sonography at 12 weeks of gestation s…