Rare combination of gelastic epilepsy, agenesis of the corpus callosum, and hamartoma.

Gelastic seizures are rare and are associated with different conditions, but mainly with hypothalamic hamartoma. We report on a boy who presented with mental retardation, aggressive behavior, and generalized tonic-clonic and gelastic seizures. Cranial imaging studies revealed a very rare combination of hypothalamic hamartoma and agenesis of the corpus callosum, which was only reported once previously. His seizure activities demonstrated a modest response to anticonvulsants.