PTPRN and type 2 diabetes mellitus: The suspicion of T2D complicated by combined HHS and DKA, was confirmed by detection of high percentage of HbA1c (11.6%), high levels of C-peptide (3.24 ng/mL) and the undetectable titre of antibodies against pancreatic islets’ antigens (ICA, GAD, IA2) while ZnT8 antibodies were not been performed.