RT Journal Article SR Electronic T1 Nivolumab-induced hypophysitis leading to hypopituitarism and secondary empty sella syndrome in a patient with non-small cell lung cancer JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e228135 DO 10.1136/bcr-2018-228135 VO 12 IS 3 A1 Jeremy Chang A1 Jeffrey Tran A1 Dina Kamel A1 Arnab Basu YR 2019 UL http://casereports.bmj.com/content/12/3/e228135.abstract AB We describe the clinical course of a 64-year-old woman with stage IVa lung adenocarcinoma who presented with over 1 month of fatigue, unintentional weight loss and emesis. She initiated treatment with nivolumab immunotherapy 1 year prior and had been tolerating the treatment well. A comprehensive workup revealed multiple endocrinological abnormalities consistent with hypophysitis leading to hypopituitarism in the form of central adrenal insufficiency and hypogonadism as well as a partially empty sella on imaging. This case demonstrates that while receiving novel forms of treatment such as immunotherapy, patients should be monitored closely for a wide range of adverse effects.