Type 1 diabetes mellitus caused by treatment with low-dose interferon-[alpha] in a melanoma patient.

Interferon-[alpha] (INF-[alpha]) is used as an adjuvant treatment for high-risk cutaneous melanoma. It has a large variety of potentially severe and irreversible side effects and can contribute toward the development of autoimmune disease. We report a case of a 59-year-old woman who developed type 1 diabetes following the use of low-dose IFN-[alpha] for the adjuvant treatment of stage IIB melanoma. Fifteen months after initiating IFN-[alpha], she presented with blood glucose of 1126 mg/dl, hyponatremia, and microalbuminuria. Antibodies to glutamic acid decarboxylase and islet antigen-2 were negative and C-peptide was markedly reduced. There was no personal or family history of any autoimmune conditions. Reinforced insulin treatment and volume substitution with saline and glucose as a counter-regulation was started. To the best of our knowledge, this is the first reported case of low-dose IFN-[alpha]-induced type 1 diabetes. Clinicians should closely evaluate the pros and cons of IFN-[alpha] treatment in an adjuvant setting and remain mindful of the possibility of drug-induced autoimmune disease. Copyright (C) 2017 Wolters Kluwer Health, Inc. All rights reserved.

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