Subarachnoid Cyst in the Patient with Psychosis: A Rare Case

Arachnoid cysts develop between arachnoid membrane and the surface of the brain. These cysts may cause neurological deficits as well as neuropsychiatric symptoms. Intracranial cysts are usually picked accidently on MRI brain studies. Mostly they are congenital and have gender prediction. Here, the authors reported a case of 57-year-old male who came with the complaint of headache, aggressive behaviour and psychotic symptoms. On neuroimaging, he had subarachnoid frontal cyst causing buckling of left frontal region which may be the underlying cause of his psychiatric symptoms. He was admitted and treated with Risperidone, Clonazepam and Naproxen with which he showed gradual improvement in the symptoms.