{Reference Type}: Case Reports {Title}: Diabetic Hemichorea-hemiballism after Prompt Improvement in Hyperglycemia. {Author}: Kitagawa M;Yamanaka Y;Adachi T;Ito J;Fukase K;Ohta I;Katagiri T; {Journal}: Intern Med {Volume}: 56 {Issue}: 22 {Year}: Nov 2017 15 {Factor}: 1.282 {DOI}: 10.2169/internalmedicine.8615-16 {Abstract}: We herein report a case of hemichorea-hemiballism in an 85-year-old man diagnosed with diabetes at 76 years of age. After a one-year interruption in treatment, he was treated with a low-calorie diet, linagliptin, and nateglinide. Over 51 days, his HbA1c level decreased from 15.8% to 7.7%. After a prompt improvement in his hyperglycemia, he began experiencing involuntary movements in the right upper and lower extremities. T1-weighted magnetic resonance imaging showed a high signal intensity in the left lens nucleus. The patient was diagnosed with diabetic hemichorea-hemiballism and received haloperidol (1 mg/day) as treatment.