A case of psychosis due to Fahr's syndrome and response to behavioral disturbances with risperidone and oxcarbazepine.

Calcification of basal ganglia or Fahr's syndrome is a rare disease characterized by bilateral and symmetrical intracranial deposition of calcium mainly in cerebral basal ganglia. Motor and neuropsychiatric symptoms are prominent features. We report a case presented with a few motor symptoms, features of delirium and prominent psychiatric symptoms (disorganized behavior) predominantly evident after the improvement in delirium. Radiological findings were suggestive of bilateral basal ganglia calcification. Parathyroid hormone levels were low with no significant findings in other investigations and negative family history. Patient showed significant improvement in behavioral disturbances with risperidone, low dose of lorazepam, oxcarbazepine, and memantine.