What is Hypereosinophilia?

Hypereosinophilia or hypereosinophilic syndrome is a disease characterised by a marked increase in the eosinophil count in the bloodstream.

The eosinophil count in human blood is normally 0.4 × 109/L (0.1 - 0.6) and results from a balance between production of eosinophils and emigration through post-capillary venules (Yamaguchi et al. 1991). Eosinophils are only a small minority of peripheral blood leucocytes and in normal subjects, most are found in the tissues of the lung and gastro-intestinal tract (Beeken et al. 1987). Blood eosinophil counts are arbitrarily classified as mild - between 0.6 to 1.5 × 109/L; moderate between 1.5 to 5 × 109/L and severe when greater than 5 × 109/L.

Questions and answers on "Hypereosinophilia"

Hello- I am attaching labs that show I have elevated Zinc Protoporphyrins, in addition to a normocytic, normochromic anemia. My B12 levels are...

doctor1 MD

Brief Answer:
there is no possibility of myelodysplasia or polycythemia

Detailed Answer:

Thanks for your query. I understand your concerns.


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My CBC has shown Eiosinophils of 21 and the prognosis is that this is high. All other counts are normal.Please advise how to treat this, if at all....

doctor1 MD


Eosinophils are basically markers of any kind of allergies. Sometimes exposure to some known or unknown allergens can cause the...

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My doctor said that my esinophil came back 7.5 and that normal is between 1 and 5. He said all the other tests for the CBC were in normal range. He...

doctor1 MD

Thanks for posting your query.

I can understand your concern for raised eosinophil count.

Eosinophilia is raised eosinophil count which can...

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