Paediatric intraventricular meningiomas. A report of two cases.

Meningiomas are rare in children comprising less than 3% of paediatric brain tumours and only 1.5-1.8% of all intracranial neoplasms. Intraventricular meningiomas (IVM) account for 0.5-5% of all meningiomas. They arise in the ventricles from arachnoid cap cells contained within the choroid plexus, the tela choroidea, or the velum interpositum. Paediatric tumours also show an association with neurofibromatosis type 2 and previous radiation exposure.We present two cases of intraventricular meningiomas, both in children. The age and site of the lesion in the two cases are uncommon. Excision of the lesions caused a total subsidence of the symptoms with no reported recurrences.