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ABSTRACT
While most patients with diabetes have Type 1 diabetes (T1D) or Type 2 diabetes (T2D) there are other etiologies of diabetes that occur less frequently. In this chapter we will discuss a number of these less common causes of diabetes. It is clinically very important to recognize these uncommon causes of diabetes as treatment directed towards the underlying etiology can at times result in the remission of diabetes (for example Cushing’s Syndrome) or be required to avoid other complications of the underlying disorder (for example hemochromatosis, which in addition to causing diabetes can lead to severe liver disease and congestive heart failure). In this chapter the following disorders that are associated with diabetes are discussed: 1) genetic disorders of insulin action (Type A insulin resistance, Donohue Syndrome/Leprechaunism, Rabson-Mendenhall syndrome); 2) maternally inherited diabetes mellitus and deafness syndrome; 3) disorders of the exocrine pancreas (pancreatitis, trauma/pancreatectomy, neoplasia, cystic fibrosis, hemochromatosis); 4) endocrinopathies (acromegaly, Cushing’s syndrome, glucagonoma, pheochromocytoma, hyperthyroidism, somatostatinoma, primary hyperaldosteronism); 5) drug induced; 6) infections; 7) immune mediated (stiff-man syndrome, anti-insulin receptor antibodies); 8) ketosis prone diabetes (Flatbush diabetes); and 9) genetic disorders sometimes associated with diabetes (Down syndrome, Klinefelter syndrome, Turner syndrome, Wilsons syndrome, Wolfram syndrome, Friedreich ataxia, Bardet-Biedl syndrome [Laurence-Moon-Biedl syndrome], myotonic dystrophy, Prader-Willi syndrome, Alström syndrome, and Werner syndrome). Gestational diabetes, monogenic diabetes (maturity onset diabetes of the young (MODY) and neonatal diabetes), lipodystrophy, fibrocalculous pancreatic disease, diabetes associated with HIV infection, diabetes due to the autoimmune polyglandular syndromes, and post-transplant diabetes are not discussed in this chapter as they are discussed in other Endotext chapters. For complete coverage of all related areas of Endocrinology, please visit our on-line FREE web-text, WWW.ENDOTEXT.ORG.