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T-cell acute childhood lymphoblastic leukemia with chromosome 14q11 anomaly: a morphologic, immunologic, and cytogenetic analysis of 10 patients

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Summary

Ten patients with T-cell acute lymphoblastic leukemia (ALL) and a chromosome anomaly involving band 14q11 are described. Mitotic index of bone marrow blasts was high in all patients (average 3.0%). Lymphoid morphology of the leukemic blasts, however, varied somewhat among the patients. The leukemic cells of 5 patients showed an immunophenotypic profile corresponding to early or common thymic differentiation stages whereas 5 children showed strong expression of CD3 suggesting a more mature thymic phenotype. Leukemic karyotypes revealed a modal chromosome number of 46 in 9 cases, 92 in one case. A chromosome translocation t(11; 14) (p13; q11) was found in 5 cases, a t(1; 14) (p32; q11) in 2 cases, a t(10; 14) (q24; q11) in one case, a (hitherto undescribed) t(12; 14) (q22; q11) in one case, and an inv(14) (q11 q32) in one patient. Additional abnormalities were t(3; 10), t(7; 9), dup (7q), del (6q), del (10q), and del (1 q). Of 32 cases with T-cell ALL successfully karyotyped in our laboratory 15 (=47%) had structural aberrations involving chromosomes 1, 3, 6, 7, 9, 10, 12, 14. Ten of these 15 patients (=67%) had a chromosome 14q11 anomaly. It is concluded that chromosome band 14q11, the gene locus of the T-cell receptor α-chain, is the most common site for structural chromosome aberrations in T-cell ALL.

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Lampert, F., Harbott, J., Ritterbach, J. et al. T-cell acute childhood lymphoblastic leukemia with chromosome 14q11 anomaly: a morphologic, immunologic, and cytogenetic analysis of 10 patients. Blut 56, 117–123 (1988). https://doi.org/10.1007/BF00320016

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  • DOI: https://doi.org/10.1007/BF00320016

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