Maturity-Onset Diabetes of the Young, Type 4, also known as maturity-onset diabetes of the young type 4, is related to maturity-onset diabetes of the young, type 8, with exocrine dysfunction and type 1 diabetes mellitus. An important gene associated with Maturity-Onset Diabetes of the Young, Type 4 is PDX1 (Pancreatic And Duodenal Homeobox 1), and among its related pathways/superpathways are Nervous system development and Glucose / Energy Metabolism. Affiliated tissues include pancreas and pancreatic islet, and related phenotypes are type ii diabetes mellitus and maturity-onset diabetes of the young