Ataxic Form of Guillain-BarreSyndrome: Di#erential Diagnosis of Acute Cerebellar Ataxia

A 52-year-old man experienced fever, sore throat, and rhinorrhea for several days. Some days after resolution he developed dizziness, paresthesia on the hands, and unsteady gait. Ocular movement was not limited. His gait was ataxic and no limb weakness on Romberg sign was evident. Muscle stretch reflexes were absent. Acute cerebellar ataxia was suspected. Anti-GQ1b antibody, however, was detected in his serum