The following characteristics suggest the possibility of a diagnosis of<unk>  in hyperglycemic and diabetic patients: * Mild to moderate hyperglycemia (typically 130–250 mg/dl, or 7–14 mmol/l) discovered before 30 years of age. However, anyone under 50 can develop<unk> . * A first-degree relative with a similar degree of diabetes. * Absence of positive antibodies or other autoimmunity (e.g., thyroiditis) in patient and family. However, Urbanova et al. found that about one quarter of Central European<unk>  patients are positive for islet cell autoantibodies (GABA and IA2A). Their expression is transient but highly prevalent. The autoantibodies were found in patients with delayed diabetes<unk> , and in times of insufficient diabetes control. The islet cell autoantibodies are absent in<unk>  in at least some populations (Japanese, Britons). * Persistence of a low insulin requirement (e.g., less than 0.5 u/kg/day) past the usual "honeymoon" period. * Absence of obesity (although overweight or obese people can get<unk>  or other problems associated with type 2 diabetes or metabolic syndrome (e.g., hypertension, hyperlipidemia, polycystic ovary syndrome). * Insulin resistance very rarely happens. * Cystic kidney disease in patient or close relatives. * Non-transient neonatal diabetes, or apparent type 1 diabetes with<unk>  before six months of age. * Liver adenoma or hepatocellular carcinoma in<unk>  type 3 * Renal cysts, rudimentary or bicornuate uterus, vaginal aplasia, absence of the vas deferens, epidymal cysts in<unk>  type 5 The diagnosis of<unk>  is confirmed by specific gene testing available through commercial laboratories.
Maturity onset diabetes of the young
Ketosis-prone diabetes
Leucine-sensitive hypoglycemia of infancy
Cystic fibrosis–related diabetes
Lipoatrophic diabetes
Diet in diabetes
Kosaki overgrowth syndrome
Idiopathic hypoglycemia