Subsequently, elevated troponin T levels were detected, and further diagnostic work-up revealed both myocardial involvement consistent with EGPA and an acute myocardial infarction due to occlusion of the left anterior descending (LAD) artery.<h4>Conclusion</h4>Central immunopathogenic pathways involved in vasculitis are not targeted by IL-5 antibodies and vasculitic manifestations may relapse or even newly emerge despite ongoing biological therapy. Here, IL5 is linked to vasculitis.