title: Pre-B cell leukemia associated with chromosome translocation 1;19.
abstract: Chromosome banding studies on 60 children with acute lymphocytic leukemia (ALL), including "null," pre-B, B, and T cell phenotypes, were performed. In 4 of 17 patients with pre-B cell ALL, we noted a previously undescribed chromosome translocation, t(1;19)(q23;q13). This translocation was not found in patients with "null" cell, B cell, or T cell ALL. Since each patient with the 1;19 translocation experienced early treatment failure, t(1;19)(q23;q13) may mark a subgroup of patients with pre-B cell ALL who have an especially poor prognosis.
mesh_terms: D000293:Adolescent; D001402:B-Lymphocytes / Q000276:immunology / Q000473:pathology*; D002648:Child; D002675:Child, Preschool; D002900:Chromosomes, Human, 1-3; D002903:Chromosomes, Human, 19-20; D005260:Female; D006801:Humans; D007945:Leukemia, Lymphoid / Q000235:genetics* / Q000276:immunology; D008297:Male; D011289:Preleukemia / Q000235:genetics*; D014178:Translocation, Genetic