Secondary hypophysitis includes cases associated with immunotherapy (interleukin 2, interferon, and medications targeting cytotoxic T-lymphocyte antigen-4 [CTLA-4] or programmed cell death 1 [PD-1]) [1–6], rupture of sellar cysts (Rathke’s cleft cysts and craniopharyngiomas), and rarely, pituitary adenomas [7–15]. The gene discussed is CTLA4; the disease is hypophysitis.