Eosinophilia

Eosinophilia is a condition in which the eosinophil count in the peripheral blood exceeds 0.5×109/L (500/μL). Hypereosinophilia is an elevation in an individual's circulating blood eosinophil count above 1.5×109/L (1,500/μL). The hypereosinophilic syndrome is a sustained elevation in this count above 1.5×109/L (1,500/μL) that is also associated with evidence of eosinophil-based tissue injury.

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