Type 1 diabetes mellitus associated with Graves' disease and Vogt-Koyanagi-Harada syndrome.

A 30-year-old woman was diagnosed as having Vogt-Koyanagi-Harada (VKH) syndrome. Her past history was Graves' disease. She was administered 1 g of methylprednisolone for three days, which was followed by oral prednisolone. Four weeks later, she developed hyperglycemic hyperosmolar coma. She was treated with intravenous normal saline and insulin, and glycemic control was improved. She was diagnosed as having type 1 diabetes mellitus (DM) because of positive test results for glutamic acid decarboxylase (GAD) antibodies and islet cell antibodies. Her human leukocyte antigen (HLA) genotypes were DQB1*0401 and DRB1*0405, which were susceptible genes for VKH syndrome, type 1 DM and Graves' disease. Therefore, we should consider that VKH syndrome might be associated with type 1 DM or Graves' disease.