Abstract
A 58-year-old man with a history of hypertension and psoriasis presented with acute-onset heart failure with an ejection fraction of 25%-30%. During the work-up, cardiac magnetic resonance imaging showed a pattern of inflammation consistent with sarcoidosis, which was confirmed with (18)F-fluorodeoxyglucose positron emission tomography . The patient was recently initiated on ixekizumab for psoriasis, which was then discontinued. This discontinuation resulted in complete resolution of cardiac sarcoidosis, with establishment of normal ejection fraction. This result suggests a potential causal association of ixekizumab-induced cardiac sarcoidosis, which is a rare phenomenon. Elucidation of the mechanism behind the effect of ixekizumab may provide insights into the possible mechanism(s) behind cardiac sarcoidosis.