Extracerebral intracranial glioneural hamartoma with extension into the parapharyngeal space.

A newborn had an extracerebral, intracranial mass extending from the right middle cranial fossa through the base of the skull to the parapharyngeal space. The mass was predominantly composed of immature brain tissue. It was enclosed by its own leptomeninges and dura and was classified as a glioneural hamartoma.