Incidence of peripheral blood eosinophilia and the threshold eosinophile count for indicating hypereosinophilia-associated diseases

  • S. Kobayashi
  • , S. Inokuma
  • , K. Setoguchi
  • , H. Kono
  • , K. Abe

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Background: A definite threshold of the peripheral blood eosinophile count that indicates the presence of hypereosinophilia-associated diseases has not yet been determined. Methods: The threshold eosinophile count at which cases of hypereosinophilia-associated diseases (n = 25) can be differentiated from those of bronchial asthma (n = 101) was determined. Then, the incidences of eosinophile counts greater than 1.0 × 109/l or the threshold level, were studied by analysis of 43 805 samples sent to the laboratory, and the diseases associated with the increased counts were determined. Results: The eosinophile count in cases of hypereosinophilia-associated diseases and in those of bronchial asthma were 10.967 ± 1.680 × 109/l and 0.574 ± 0.045 × 109/l, respectively (P < 0.001); the threshold was 2.052 × 109/l. The percentages of samples with an eosinophile count of more than 1.0 × 109/l and 2.052 × 109/l were 0.6% and 0.1%, respectively; the latter comprised of 41 samples from 24 patients including eight with hypereosinophilia-associated diseases. The patients with hypereosinophilia-associated diseases had a significantly higher count, and a higher incidence of counts of more than 2.052 × 109/l, than others, including patients with malignancies and symptoms conventionally referred as "atopic diseases". Conclusion: Hypereosinophilia-associated diseases are associated with a very high eosinophile count of more than 2.052 × 109/l, which was observed rarely.

Original languageEnglish
Pages (from-to)950-956
Number of pages7
JournalAllergy: European Journal of Allergy and Clinical Immunology
Volume57
Issue number10
DOIs
StatePublished - Oct 2002
Externally publishedYes

Keywords

  • Asthma
  • Eosinophile
  • Hypereosinophilic syndrome
  • IgE
  • Malignancy

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