A case of posterior reversible encephalopathy syndrome in a patient undergoing automated peritoneal dialysis.

A 44-year-old man undergoing automated peritoneal dialysis (PD) developed headache and dizziness with truncal ataxia and ataxic gait. Severe hypertension (systolic blood pressure/diastolic pressure: 193/83 mm Hg) and lower extremity edema were present, and his PD efficiency (weekly KT/V: 1.49) was inadequate. Magnetic resonance imaging revealed diffuse hyperintensities in the brain stem and bilateral cerebellar hemispheres on fluid-attenuated inversion recovery and apparent diffusion coefficient mapping imaging. Based on these findings, the patient was diagnosed with posterior reversible encephalopathy syndrome due to hypertension and uremia. He was treated with antihypertensive agents, and we changed the PD prescription to improve PD efficiency. Thereafter, his symptoms gradually improved, and abnormal findings on brain magnetic resonance imaging disappeared in accordance with lowering blood pressure.