[Ependyma cyst of the 3d ventricle, causing sudden death]

A case of ependymal cyst of the third ventricle in a 18 years old female causing sudden death is reported. The patient had no typical clinical symptoms. Literary data dealing with the origin and clinical symptoms of the ependymal cysts are reviewed. It is assumed, that ependymal cyst is a congenital fissular tumour.