Some 10% hemoglobin A1c value, normal C-peptide level and negative glutamic acid decarboxylase (GAD-65), and islet cell autoantibodies suggested the diagnosis of a new-onset type 2 diabetes mellitus (DM) presenting with an uncommon triad of DKA and hypertriglyceridemia (HTG)-induced AP. This evidence concerns the gene GAD2 and type 2 diabetes mellitus.