Enlarged persistent anterior fontanel following head injury. A case report.

A 2-year-old child is reported with an unusual large anterior fontanel. The boy sustained a head injury at the age of 10 months. Post traumatic skull X-rays showed a parietal bone fracture. At the age of 2 years a leptomeningeal cyst underlying the anterior fontanel was found on CT. A causal relation between the persistent anterior fontanel and the roentgenographic findings is discussed.