[Skull lacunae in myelomeningocele]

Lacunar skull was found in 60% of 80 patients with myelomeningocele. Most patients with lacunae were neonates. Lacunar skull is significantly correlated with hydrocephalus, stenosis of aqueduct of Sylvius, and Arnold-Chiari malformation. All infants with myelomeningocele should have roentgenograms of the skull at birth. Lacunar skull is associated with a poor mental prognosis.