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Updated: May 1, 2026

Author Spotlight: Investigating the Pathophysiology of Eosinophilic Esophagitis
Published on: May 10, 2024
Hypereosinophilic syndrome
1Allergy and Immunology, Respiratory Institute, Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio.
Insights
Understanding the molecular and cellular mechanisms of hypereosinophilic syndrome (HES) is crucial for clinicians. Identifying these disease pathways can lead to targeted, mechanism-based treatments for HES patients.
Area of Science:
- Hematology
- Molecular Biology
- Immunology
Background:
- Hypereosinophilic syndrome (HES) is a group of disorders characterized by sustained eosinophilia.
- Recent research has led to proposed changes in HES definitions based on identified molecular and cellular phenotypes.
Purpose of the Study:
- To summarize molecular and cellular mechanisms of HES.
- To provide clinicians with relevant information for patient evaluation and treatment.
Main Methods:
- Comprehensive review of peer-reviewed literature.
- Inclusion of studies on HES pathogenesis, definitions, classification, diagnosis, and treatment.
Main Results:
- Proposed revisions to HES definitions are based on specific cellular and molecular disease phenotypes.
- Specific disease mechanisms identified hold potential clinical and therapeutic significance.
- The molecular pathogenesis of HES remains unknown in most cases despite advances.
Conclusions:
- Identifying specific HES disease mechanisms enables clinicians to offer targeted, mechanism-based treatment options.
- This knowledge empowers clinicians to improve patient care for hypereosinophilic syndrome.
Objective:
To summarize the identified molecular and cellular mechanisms relevant to clinicians evaluating patients with hypereosinophilic syndrome (HES).
Data Sources:
Review of relevant peer-reviewed literature.
Study Selections:
Studies on the pathogenesis of HES in relation to consensus definitions, disease classification, mechanisms of disease, and diagnosis and treatment are included.
Results:
Changes to the definition of HES have been proposed based on recent studies identifying specific cellular and molecular disease phenotypes. Identification of specific mechanisms of disease may have clinical and therapeutic significance. Despite recent advances, in most cases the molecular pathogenesis of HES remains unknown.
Conclusion:
Identification of specific HES disease mechanisms empowers the practicing clinician to offer specific mechanism-based treatment options to patients with HES in their clinical practice.
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