Psychosis in multiple sclerosis associated with left temporal lobe lesions on serial MRI scans.

There is retrospective evidence of a correlation between psychosis in multiple sclerosis (MS) patients and temporal lobe pathology. A 35-year-old woman with MS presented with psychosis. There was no concurrent history of medication/substance use or family history. Comparison with previous MRI scans showed significant progression of lesions within the periventricular white matter of the left temporal lobe. This case highlights the association of psychosis and MS progression with worsening of left temporal lobe lesions. Prospective studies are required to ascertain the extent to which left temporal lobe lesions are predictive of future psychosis.