“…4Y6 Besides the cosmetic facial deformity, severe problems can arise with the associated micromyelia, high intracranial pressures, proptosis, papilledema, hydrocephalus, hindbrain herniation, and skull base dysplasias. 7 Those who survive early infancy have a high incidence of neurological impairment that can continue throughout life. The neurological sequelae arise from hydrocephalus, hindbrain herniation, and venous hypertension.…”