title: Core binding factor acute myeloid leukemia (CBF-AML) in México: a single institution experience.
abstract: Twenty one patients with CBF-AML presented prospectively in the Centro de Hematología y Medicina Interna de Puebla (Puebla, México) between February 1995 and March 2010, 14 with the t(8;21)(q22;q22) and 7 with the inv(16)(p13;q22)/t(16;16)(p13;q22); they represent 13% of all cases of AML. The median age of the patients was 24 years (range 1 to 61). Seven of 14 patients with t(8;21)(q22;q22) had an M2 morphology whereas 3/7 with the inv(16) had an M4 morphology; in addition to the myeloid markers identified by flow-cytometry (surface CD13, surface CD33, and cytoplasmic myeloperoxidase) lymphoid markers were identified in the blast cells of 8/14 cases of the t(8;21) patients, but in no patient with the inv(16). Nineteen patients were treated with combined chemotherapy and 16 (84%) achieved a complete molecular remission. Seven patients were auto or allografted. Relapses presented in 10/16 patients. The median probability of overall survival (OS) has not been reached being above 165 months, whereas the 165-month probability of OS and leukemia-free survival was 52%; despite a tendency for a better outcome of patients with the t(8;21), there were no significant differences in survival of patients with either the t(8;21) or the inv(16). In this single institution experience in México, we found that the CBF variants of AML have a similar prevalence as compared with Caucasian populations, that the co-expression of lymphoid markers in the blast cells was frequent in the t(8;21) and that these two AML subtypes were associated with a relatively good long-term prognosis. Further studies are needed to describe with more detail the precise biological features of these molecular subtypes of acute leukemia.
authors.affiliation: Centro de Hematología y Medicina Interna de Puebla, Clinica Ruiz, Puebla. gruiz1@clinicaruiz.com
authors.forename: Guillermo J
authors.initials: GJ
authors.lastname: Ruiz-Delgado
authors.forename: Julio
authors.initials: J
authors.lastname: Macías-Gallardo
authors.forename: Julia
authors.initials: J
authors.lastname: Lutz-Presno
authors.forename: Javier
authors.initials: J
authors.lastname: Garcés-Eisele
authors.forename: Ana
authors.initials: A
authors.lastname: Hernández-Arizpe
authors.forename: Maryel
authors.initials: M
authors.lastname: Montes-Montiel
authors.forename: Guillermo J
authors.initials: GJ
authors.lastname: Ruiz-Argüelles
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D050660:Core Binding Factors; D005260:Female; D006801:Humans; D007223:Infant; D015470:Leukemia, Myeloid, Acute / Q000175:diagnosis / Q000453:epidemiology / Q000235:genetics / Q000628:therapy; D008297:Male; D008800:Mexico; D008875:Middle Aged; D011446:Prospective Studies; D055815:Young Adult
chemical_list: D050660:Core Binding Factors