Eosinophilia

Uncommon card · No. 190795

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. Eosinophils usually account for less than 7% of the circulating leukocytes. A marked increase in non-blood tissue eosinophil count noticed upon histopathologic examination is diagnostic for tissue eosinophilia. Several causes are known, with the most common being some form of allergic reaction or parasitic infection. Diagnosis of eosinophilia is via a complete blood count (CBC), but diagnostic procedures directed at the underlying cause vary depending on the suspected condition(s). An absolute eosinophil count is not generally needed if the CBC shows marked eosinophilia. The location of the causal...

Read on Wikipedia · Image Ed Uthman, MD, Houston, Texas, USA, CC BY 3.0