[Case Report of a Suspected Extrapontine Myelinolysis due to Hyperglycemic Hyperosmolar Syndrome].

A 68-year-old female, who suffered from depression, fell down the stairs in her house. She was soon transferred to an accident and emergent ward by an ambulance. Two days later, she was transferred and admitted to our hospital. Next day after admission to our ward, her consciousness level changed for the worse. She developed diabetic ketoacidosis, and was administered insulin during reinfusion. Next day, her diabetic ketoacidosis improved;however, her consciousness level was still poor. Brain magnetic resonance imaging(MRI)showed suspected osmotic myelinolysis lesions in the bilateral cerebellar hemisphere and globus pallidus. After conservative therapy, her lesions almost disappeared in 2 months. We diagnosed the lesions as reversible extrapontine myelinolysis.