Successful Treatment of Immune Checkpoint Inhibitor–Induced Diabetes With Infliximab

We report a case of a 53-year-old male patient with melanoma who was treated with combination immune checkpoint blockade (ICB) with ipilimumab and nivolumab. The patient had advanced disease with metastasis to the liver, lung, and lymph nodes. After two doses of ICB, the patient developed hypocalcemia as a result of an immune-mediated hypoparathyroidism that was treated with calcium and vitamin D substitution. In addition, the patient suffered from immune-related colitis that required treatment with corticosteroids and two doses of infliximab. Combination immunotherapy led to a metabolic complete remission of the melanoma. After tapering corticosteroids, the patient was continued on nivolumab for several weeks. No abnormalities of blood glucose were noted until then in an otherwise lean patient with a BMI of 19.6 kg/m2. When the patient developed a seronegative oligoarthritis affecting the right knee and both ankles, he was treated with …