In a remarkable medical breakthrough, doctors saved a fetus diagnosed with congenital high airway obstruction syndrome (CHAOS) — a rare, usually fatal condition affecting 1 in 50,000 pregnancies. At just 25 weeks, surgeons performed an unprecedented early Ex-utero intrapartum treatment (ExIT) procedure, partially delivering the fetus to drain fluid from his lungs before returning him to the womb.
The surgery relieved pressure on the baby’s heart, allowing further development. Baby Cassian was later born prematurely but is recovering well.
This high-risk intervention highlights how innovative fetal surgery could transform outcomes for rare conditions, offering new hope to families facing life-threatening prenatal diagnoses.

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