Reversible posterior leukoencephalopathy and Adie's pupil after measles vaccination

Reversible posterior leukoencephalopathy syndrome is an increasingly recognized disorder with typical radiologic findings of bilateral gray- and white-matter abnormalities in the posterior regions of the cerebral hemispheres. The majority of patients with reversible posterior leukoencephalopathy syndrome are adults, and it is rare in children. Previously reported associations of reversible posterior leukoencephalopathy syndrome include hypertension, vasculitis, nephrotic syndrome, severe hypercalcemia, hemolytic uremic syndrome, eclampsia, renal failure, and use of immunosuppressive drugs. Adie's pupil is described as the presence of a large unilateral or bilateral tonic pupil related to virus infections or trauma. In this article, we describe a case of reversible posterior leukoencephalopathy and Adie's pupil association that occurred after measles vaccination. To our knowledge, this association has not been reported.