title: Acute lymphoblastic leukemia first appearing as hypereosinophilia.
mesh_terms: D002675:Child, Preschool; D004802:Eosinophilia / Q000209:etiology*; D006801:Humans; D007945:Leukemia, Lymphoid / Q000097:blood / Q000150:complications*; D008297:Male; D013577:Syndrome