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Estudios citogenéticos en niños chilenos con leucemia linfoblástica aguda / Cytogenetic studies in chilean children with acute lymphoblastic leukemia
Rev. méd. Chile ; 122(11): 1239-47, nov. 1994. tab, ilus
Article Dans Espagnol | LILACS | ID: lil-144021
ABSTRACT
Acute lymphoblastic leukemia (ALL) is the most frequent childhood cancer. The leukemic cells of ALL patients show several well defined numeric and structural chromosomal abnormalities which are universally known for its prognostic implications. We studied a group of 44 children with ALL, to investigate the incidence of chromosome aberrations in ALL, its lymphocyte lineage and some clinical feature associations, ans the finding of non previously described aberrations. A high proportion of patients (79.5 per cent) showed chromosomal abnormalities. Most of them had a pseudodiploid karyotype (46 chromosomes), characterized mainly by a translocation. In relation to chromosome number, 27 percent of them were hyperdiploid with more than 50; 9 percent hyperdiploid between 47 - 50 and 7 percent hypodiploid (less than 46). Among structural aberrations found, were the following recurrent translocations t(1;19), t(4;11), t(9;22) in 6.8 percent, 9.1 percent and 2.3 percent of cases respectively, all related to an early B immunophenotype. Other translocations found, compromised regions 7q22,9p21 -24. Two new translocations in ALL were found 8(1;5)(q23;q33), apparently balanced and t(13;21)(q14;q22), unbalanced. Other recurrent structural changes found were deletion (6q), (7q), (7q), (11q), (12q), inversion (3q), isochromosome (7q), maker chromosomes and double minutes. The distribution of chromosome abnormalities in this group of patients was in agreement with previous reports from other investigators
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Indice: LILAS (Amériques) Sujet Principal: Leucémie-lymphome lymphoblastique à précurseurs B et T Type d'étude: Étude pronostique Limites du sujet: Enfant d'âge préscolaire / Femelle / Humains / Bébé / Mâle Pays comme sujet: Amérique du Sud / Chili langue: Espagnol Texte intégral: Rev. méd. Chile Thème du journal: Médicament Année: 1994 Type: Article / descriptif de projet

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Indice: LILAS (Amériques) Sujet Principal: Leucémie-lymphome lymphoblastique à précurseurs B et T Type d'étude: Étude pronostique Limites du sujet: Enfant d'âge préscolaire / Femelle / Humains / Bébé / Mâle Pays comme sujet: Amérique du Sud / Chili langue: Espagnol Texte intégral: Rev. méd. Chile Thème du journal: Médicament Année: 1994 Type: Article / descriptif de projet