Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 1 de 1
Filtrar
Añadir filtros








Intervalo de año
1.
Rev. méd. Chile ; 129(6): 634-42, jun. 2001. tab, graf
Artículo en Español | LILACS | ID: lil-295392

RESUMEN

Background: Acute leukemia (AL) in infants generally shows distinctive biologic features and has a poor prognosis. Aim: To study the frequency of the cytogenetic alteration of11q23 chromosome or the recombination of MLL gene in infants less than 18 months old, with acute leukemia. Patients and methods: We analyzed 37 cases of AL in infants less than 18 months of age diagnosed in Chile from 1989 to 1999. The clinical features and cytogenetic/molecular defects of 11q23MLL gene rearrangement and their influence in prognosis were determined. Results: There were 18 cases of acute Lymphoblastic leukemia (ALL) characterized by female sex (67 per cent) high presenting leukocyte count (median 99 x109/L), blast cells with a CD10 negative phenotype (50 per cent) and 11q23/MLL rearrangement (39 per cent). Molecular abnormalities of 11q23 were significantly associated with adverse prognosis, with an event free survival (EFS) of only 14 ñ 12 per cent. Interestingly, infants with germ line 11q23 had a very good outcome with an EFS of 73 ñ 11 per cent (p<0.025). There were 19 cases of acute myeloblastic leukemia (AML) characterized by male sex (63 per cent) high leukocyte count (median 93 x 109/L), FAB-MS morphology (53 per cent) and 11q23/MLL rearrangement (53 per cent). EFS was very poor, 20 ñ 9 per cent and 33ñ4 per cent for rearranged and germinal group respectively (p=NS), due to a high mortality rate during the first month of diagnosis. Conclusions: These findings demonstrate that Chilean ALL infants with 11q23 abnormalities have a very poor prognosis. However those with germinal state can enjoy a prolonged disease free survival with the current treatment protocols


Asunto(s)
Humanos , Masculino , Femenino , Lactante , Cromosomas Humanos Par 11/genética , Leucemia Mieloide Aguda/genética , Aberraciones Cromosómicas/genética , Leucemia-Linfoma Linfoblástico de Células Precursoras/genética , Leucemia Mieloide Aguda/diagnóstico , Análisis Citogenético , Leucemia-Linfoma Linfoblástico de Células Precursoras/diagnóstico , Marcadores Genéticos/genética , Pronóstico , Recombinación Genética/genética
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA