Abstract
Introduction
Nivolumab is an immune checkpoint inhibitor used to treat advanced renal cell carcinoma (RCC). Adrenal insufficiency has been reported as an adverse event associated with nivolumab. We report a case of adrenal insufficiency that occurred more than 1 year after the initiation of nivolumab while patient was still receiving treatment.
Case Report
The patient was a 90-year-old Japanese woman. Fatigue and decreased cortisol levels were observed after 15 courses of nivolumab.
Management & Outcome
The symptoms improved with the initiation of oral hydrocortisone 30 mg once a day. Nivolumab was not resumed, and the patient is still under outpatient observation.
Discussion
This is the first report of RCC with adrenal insufficiency occurring more than 1 year after the initiation of the nivolumab regimen. Symptoms of adrenal insufficiency are similar to those of cancer progression. When symptoms of fatigue occur in patients receiving nivolumab, adrenal insufficiency should be suspected, regardless of the duration from nivolumab initiation.
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