PTPRN and diabetes mellitus: Autoantibodies are present in about 50% of patients with ICI-associated endocrinopathies, 47% of patients with thyroid diseases are positive for any thyroid autoantibody, and 48% of patients experiencing diabetes mellitus (DM) were positive for any DM-associated autoantibodies (glutamic acid decarboxylase antibodies, anti-IA2, anti-islet, anti-insuline, anti-ZnT8...).