RESUMO
Neuropsychiatric events are common in patients with systemic lupus erythematosus (SLE). The estimated incidence of neuropsychiatric SLE (NPSLE) is 30 to 40%. However, NPSLE poses a difficult diagnostic challenge because a variety of conditions should be considered in the differential diagnosis, especially when patients present with uncommon or rare NPSLE features. We herein describe a 49-year-old man with SLE who initially presented with diplopia, ptosis, and gait disturbance that had developed 1 week after an upper respiratory tract infection. He was finally diagnosed with Miller Fisher syndrome (a variant of Guillain-Barre syndrome) according to clinical symptoms, anti-GQ1b antibody positivity, and neurological study results. The patient recovered without sequelae with intravenous immunoglobulin therapy. This is the first report to describe a case of Miller Fisher syndrome that developed in a patient with SLE in Korea and suggests that Miller Fisher syndrome should be included as a differential diagnosis of NPSLE.