Causes of eosinophilia

"CHINA"

• Connective tissue disorders
• Helminthic worm infections
• Idiopathic HES  (Hypereosinophilic syndrome)
• Neoplasias (CML,AML,myeloproliferative diseases,myelodysplastic syndromes)
• Allergies

In some neoplastic disorders (CML,AML,myeloproliferative diseases,myelodysplastic syndromes) the hypereosinophilia is part of neoplastic clonal expansion affecting the myeloid lineage.