Isolated adrenocorticotrophic hormone deficiency in a patient treated with checkpoint inhibitor therapy.

Treatment of advanced melanoma has significantly improved with the advent of checkpoint inhibitor therapy. With the widespread use of these agents, side effects are being increasingly recognized, including immune-related adverse events. We report the onset of adrenal insufficiency in a patient with advanced melanoma who was exposed to two checkpoint inhibitors: ipilimumab and nivolumab. His symptoms initially resolved with steroid replacement but he was unable to be weaned off hormone replacement and required long-term oral hydrocortisone treatment.