A case of olfactory groove meningioma misdiagnosed as schizophrenia.

Olfactory groove meningiomas are relatively uncommon slow-growing tumors which can produce symptoms that progress insidiously. Often, patients present with personality changes and cognitive disturbances. These changes may not become apparent until the tumors become quite large, although other factors, eg, peritumoral edema and resultant brain tissue compression, influence clinical presentation.