Eosinophilia differential diagnosis

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief:

Overview

Eosinophilia is defined based on a laboratory finding of elevated eosinophil levels in peripheral blood -- it is a symptom rather than a disease. Eosinophilia can be caused by a wide range of disease processes, including infectious, autoimmune, neoplastic, allergic, drug-induced, and idiopathic. When eosinophilia is identified based on peripheral blood counts, the etiology (discussed in other sections) should be investigated.