Surgeons at Boston Children's Hospital performed an extraordinary procedure on a fetus at 25 weeks gestation, performing partial delivery and lung surgery to treat a severe congenital airway malformation. The intervention placed both mother and child at extreme risk but offered the only chance of survival for the unnamed patient.
The team used an ex utero intrapartum treatment procedure, or EXIT, which allows surgeons to access and operate on a fetus while it remains partially connected to the placenta through the umbilical cord. This maintains fetal blood circulation during surgery, providing oxygen and removing carbon dioxide. Without the placental support, the developing lungs could not function independently at such an early gestational age.
The specific diagnosis involved a severe tracheal stenosis or airway blockage that would have prevented normal breathing at birth. Standard postnatal surgery would have been impossible because the baby's airway was too compromised to intubate safely. The EXIT approach allowed surgeons to work on the airway while the fetus still received oxygen from maternal circulation.
Dr. Olutoyin Olutoye and colleagues at Boston Children's Hospital have pioneered EXIT procedures for complex fetal conditions. The surgery required precise coordination between obstetric, neonatal, and surgical teams. Anesthesia specialists maintained the fetus under general anesthesia while protecting maternal safety throughout the extended procedure.
The risks were substantial. Premature delivery at 25 weeks carries high neonatal mortality and morbidity rates. Uterine rupture, placental abruption, and maternal hemorrhage represented serious complications. Yet without intervention, the fetus faced certain death from airway obstruction at birth.
EXIT procedures remain rare, performed at only a handful of specialized centers worldwide. Success depends on meticulous patient selection, experienced surgical teams, and institutional infrastructure supporting complex fetal interventions. The Boston case