Diagnostic Criteria for Idiopathic Hypereosinophilic Syndrome (HES)

Diagnostic Criteria for Idiopathic Hypereosinophilic Syndrome (HES) are:

1. Persistent eosinophilia of over 1500/cubic millimeter for longer than 6 month;

2. Lack of evidence of other known causes of secondary hypereosinophilia (SH);

3. Multiple organ involvement.

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