What is CHAOS?
Congenital High Airway Obstruction Syndrome / CHAOS is a condition in which the fetus has:
- Massively enlarged lungs
- A flattened diaphragm
- A dilated tracheobronchial tree
- Fluid in the abdomen
- Other signs of in utero heart failure (non-immune hydrops) due to complete or nearly complete obstruction of the fetal airway