Rationale for the use of fetal ventriculosubgaleal shunts for the treatment of aqueduct stenosis.

Fetal hydrocephalus causes irreversible neural injury in utero, yet no prenatal therapy currently exists. Postnatal treatments such as ventriculoperitoneal shunts and endoscopic third ventriculostomy with choroid plexus cauterization cannot reverse pre-existing brain injury. We propose that the ventriculosubgaleal shunt (VSGS), widely used as a temporizing measure in severely premature neonates, may offer a feasible and ethically justifiable approach for in utero treatment. VSGS placement avoids the complications of ventriculoamniotic shunts and leverages a closed system that can relieve intracranial pressure and potentially preserve brain tissue integrity. Given its technical simplicity, established safety profile, and alignment with core ethical principles - including maternal autonomy and proportional risk-benefit, we argue for consideration of VSGS as an investigational fetal therapy in selected cases of progressive hydrocephalus. Given its investigational status, implementation should be limited to clinical trials with stringent IRB supervision and ethical safeguards.