Hypereosinophilic syndrome

Hypereosinophilic syndrome (HES) refers to a group of diseases (multisystem disorders) characterized by marked peripheral blood eosinophilia greater than 1.5 / nl for more than 6 months (or bone marrow eosinophilia without detectable cause), and significant organ dysfunction. 

The following forms are distinguished:

Idiopathic HES

Myeloproliferative HES

Lymphocytic HES

Family HES

HES overlap syndrome (eosinophilic esophagitis, eosinophils

Pneumonia, hypereosinophilic dermatitis)