title: Spontaneous resolution of hypereosinophilic syndrome in an infant without treatment.
abstract: We report on a 4-month-old boy with hypereosinophilic syndrome (HES) and spontaneous progressive resolution without treatment. Differential diagnosis excluded myeloproliferative, lymphocytic, familiar, associated, and overlap HES. The final diagnosis was undefined HES. Repeated measurements of blood eosinophil counts, monitoring of clonal T cells, and observation of skin lesions and organ involvement were carefully performed as an outpatient.
authors.affiliation: Department of Hemato-Oncology and Stem Cell Transplantation, Hospital Infantil Universitario Niño Jesús, Madrid, Spain.
authors.forename: Blanca
authors.initials: B
authors.lastname: Herrero
authors.forename: Jorge Ruiz
authors.initials: JR
authors.lastname: de la Fuente
authors.forename: Esther
authors.initials: E
authors.lastname: Aleo
authors.forename: Fernando
authors.initials: F
authors.lastname: Carceller
authors.forename: Álvaro
authors.initials: Á
authors.lastname: Lassaletta
authors.forename: Manuel Ramírez
authors.initials: MR
authors.lastname: Orellana
authors.forename: Antonio
authors.initials: A
authors.lastname: Pérez-Martínez
mesh_terms: D003937:Diagnosis, Differential; D004804:Eosinophils / Q000473:pathology; D006801:Humans; D017681:Hypereosinophilic Syndrome / Q000175:diagnosis* / Q000517:prevention & control; D007223:Infant; D007960:Leukocyte Disorders / Q000175:diagnosis* / Q000517:prevention & control; D008297:Male; D011379:Prognosis; D012871:Skin Diseases / Q000175:diagnosis* / Q000517:prevention & control; D013601:T-Lymphocytes / Q000473:pathology