For a diagnosis of<unk> , hypereosinophilia with greater than 30% eosinophils is required. Serum IgE is usually normal. In cases associated with PDGFRB, serum vitamin B12 and tryptase may be elevated.
Chronic eosinophilic leukemia
Acute eosinophilic leukemia
Tropical eosinophilia
Thymoma with immunodeficiency
Diffuse infiltrative lymphocytosis syndrome
Hemophagocytic lymphohistiocytosis
Mast cell leukemia
Hereditary pyropoikilocytosis