Hypereosinophilic syndrome.

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.