Eosinophilic granulomatosis with polyangitis (EGPA) (formerly Churg-Strauss syndrome) is a rare small-sized vessel vasculitis belonging to the group of anti-neutrophil cytoplasm antibody (ANCA)-associated vasculitides. MPO-ANCA is present in only 31 to 38% of patients. In this review, we describe the pathophysiology of EGPA, which is characterized by a genetic predisposition, an environmental association, and a cellular dysfunction of eosinophils, neutrophils, and T and B cells.
Keywords: ANCA-MPO; Eosinophilia; Eosinophlic granulomatosis with polyangitis; Granulomatose éosinophilique avec polyangéite; Hyperéosinophilie; MPO-ANCA; Réponse lymphocytaire Th2; Th2 response; Vascularite; Vasculitis.
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