1. Insulin dependent diabetes- its due to autoimmune beta-cell destruction ( also known as type 1 diabetes). Mainly occur childern and young adults.
2.Non-Insulin dependent diabetes- its due to insulin resistance , impaired insulin secretion also known as type 2 diabetes. associated with obesity.
3.Gestational diabetes- occurs 2-5% of all pregnancies, disappears after delivery.
4.Genetic defects in beta-cell destruction
5. Mutation in insulin receptors
6. Diseases or injuries in pancreas ; Pancreatitis, neoplasm , cystic fibrosis, Trauma , Pancreatectomy.
7.Infection- Congenital rubella
8.Drug induced - Glucocorticocoids, Thyroharmone, Dilantin(anti-epileptic drug), Thiazides( Treat high blood pressure)
9. Endocrinopathies- Acromegaly, Cushing syndromes, Glucoma
10.Genetic syndromes- Down syndromes , Huntingtons chorea, Myotonic dystrophy