INS and brain edema: There was an absence of autoantibodies against diabetes mellitus, although a computed tomography (CT) scan of the head revealed cerebral edema. These findings accordingly confirmed the diagnosis of DKA secondary to T2DM, on the basis of which, he was treated with bowel rest, intravenous fluids, continuous insulin infusion to gradually lower the elevated blood glucose levels, head elevation for cerebral edema, and electrolyte correction.