Posterior reversible encephalopathy syndrome (PRES) is a neurologic condition characterized by vasogenic edema on neuroimaging and is associated with the setting of severe hypertension, eclampsia, autoimmune disease, malignancy, and immunosuppressive drugs. We report on a 42 year-old female systemic lupus erythematous patient who presented altered consciousness, seizure, and visual disturbance after cyclophosphamide pulse therapy. Magnetic resonance imaging (MRI) showed multi-focal high signal intensity lesions in the parieto-occipital cortex bilaterally and in the subcortical white matter. Her condition was improved and her MRI lesions were resolved after aggressive blood pressure control and high-dose steroid treatment. It is possibly the first reported case of PRES in a patient with lupus, treated with cyclophosphamide pulse therapy during a nephritis flare in Korea.

Keywords: Posterior reversible encephalopathy syndrome, Systemic lupus erythematosus, Cyclophosphamide