Maturity onset diabetes of the young (MODY) refers to any of several hereditary forms of diabetes caused by mutations in an autosomal dominant gene (sex independent, i.e. inherited from any of the parents) disrupting insulin production. MODY is often referred to as “monogenic diabetes” to distinguish it from the more common types of diabetes (especially type 1 and type 2), which involve more complex combinations of causes involving multiple genes (i.e., “polygenic”) and environmental factors. MODY 2 and MODY 3 are the most common forms. “Maturity onset diabetes of the young (MODY) is a rare autosomal dominant form of type 2 DM affecting young people with a positive family history.” MODY should not be confused with latent autoimmune diabetes of adults (LADA) — a form of type 1 DM, with slower progression to insulin dependence in later life.