title: [Prognostic value of pre-B immunophenotype in early treatment response among acute pediatric lymphoblast leukemia patients].
abstract: OBJECTIVE
  To determine the prognostic value of preB immunophenotype and its variants on early treatment response among of acute pediatric lymphoblast leukemia.
  
  
  METHODS
  A case-control study nested in a cohort was carried out with male and female patients 15 years and younger with recently diagnosed pre-B lymphoblast leukemia. A panel of B, T, monoclonal antibodies of the myelo-monocytic and megakaryocytic cell type was used. Response was assessed by bone marrow aspiration 14 days post treatment.
  
  
  RESULTS
  54 patients were included. The median age was 7 years (2 months - 14 years) median leukocyte count was 13,450/mm3 (1200-986,000/mm3). We identified 29 cases with late pre-B immune phenotype, 19 cases with common pre B and 6 cases with early preB immunophenotype. Eleven, patients also displayed myeloid antigens. A significant association (p=0.034) was found between early treatment response and the presence of myeloid antigens. No association was found between the pre-B immunophenotype, age and leukocyte count with early treatment response (p=0.264).
  
  
  CONCLUSIONS
  We need to pay special emphasis on early treatment response in children with lymphoblast leukemia as our study did not corroborate the common finding that clinical factors and immune phenotype can be predictive factors.
authors.affiliation: Servicio de Hematología, Instituto Mexicano del Seguro Social, San Luis Potosí, S.L.P. S.L.P., México.
authors.forename: Lourdes Cecilia
authors.initials: LC
authors.lastname: Correa-González
authors.forename: Peter B
authors.initials: PB
authors.lastname: Mandeville
authors.forename: Javier
authors.initials: J
authors.lastname: Manrique-Dueñas
authors.forename: Francisco
authors.initials: F
authors.lastname: Alejo-González
authors.forename: Abel
authors.initials: A
authors.lastname: Salazar-Martínez
authors.forename: Oscar Jesús
authors.initials: OJ
authors.lastname: de Pérez-Ramírez
authors.forename: Juan Francisco
authors.initials: JF
authors.lastname: Hernández-Sierra
mesh_terms: D000293:Adolescent; D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D016130:Immunophenotyping; D007223:Infant; D007945:Leukemia, Lymphoid / Q000188:drug therapy* / Q000276:immunology*; D008297:Male; D015452:Precursor B-Cell Lymphoblastic Leukemia-Lymphoma / Q000188:drug therapy* / Q000276:immunology*; D011379:Prognosis