Ossification of arachnoid granulations with associated hydrocephalus.

An autopsy was performed on a 26-year-old female with clinical history of hydrocephalus since birth. The dissection of the head and the histopathological examination demonstrated ossification of the arachnoid granulations and hydrocephalus. Arachnoid ossification usually involves the meninges covering spinal cord and rarely occurs within the cranial cavity. Intracranial arachnoid ossification is not reported causing any complications. To our knowledge, this is the first case of ossification of the arachnoid granulations complicated with hydrocephalus.