Arnold-Chiari malformation and agenesis of the corpus callosum in a case of brief psychotic disorder

We report a case of a brief psychotic disorder with type I Arnold-Chiari malformation and agenesis of the corpus callosum which was detected on a magnetic resonance imaging (MRI) scan. The patient was started on antipsychotics and underwent decompression surgery. He is on regular follow-up and returned to normal daily life within a few weeks. The antipsychotics were tapered and eventually stopped, and the patient is maintaining well in the follow-up. With improved neuroimaging techniques reporting brain morphological abnormalities in psychiatric patients has increased and we suggest that a neuroimaging investigation is valuable in psychotic illness.