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This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Rights and Permissions Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Cross, A. H. Articles by Mirro, J J. Search for Related Content PubMed PubMed Citation Articles by Cross, A. H. Articles by Mirro, J J. Social Bookmarking                   What's this?  Previous Article  |  Table of Contents  |  Next Article  Acute myeloid leukemia with T-lymphoid features: a distinct biologic and clinical entity AH Cross, RM Goorha, R Nuss, FG Behm, SB Murphy, DK Kalwinsky, S Raimondi, GR Kitchingman and J Mirro Department of Virology and Molecular Biology, St Jude Children's Research Hospital, Memphis, TN 38101. We studied the clinical and biologic features of 10 cases of acute leukemia that met standard French-American-British (FAB) criteria for acute myeloid leukemia (AML) but in which the blast cells also expressed the T-cell-associated CD2 surface antigen. All cases had greater than 3% myeloperoxidase and Sudan black B-positive leukemic blasts, and blasts from seven cases contained Auer rods. Reactivity of the cells with a panel of monoclonal antibodies (MAbs) indicated that leukemic cells in all cases expressed myeloid-associated (CD11b, CD13) surface antigens, further supporting the diagnosis of AML. However, blasts from every patient coexpressed the T-cell-associated surface CD2 and CD7 as well as cytoplasmic CD3 antigens. Blasts from five patients expressed surface CD25, whereas blasts from only one expressed surface CD3. Five patients had rearranged T-cell receptor beta-chain genes, whereas only three had rearranged T-cell receptor gamma-chain genes. This pattern of lineage-related gene expression appears to define a distinct subtype of AML with T-lymphoid features (CD2+ AML) and could reflect either aberrant gene expression in leukemic blasts or transformation of a pluripotent stem cell having a flexible pattern of gene expression. Clinically, these 10 patients presented at an older age with a higher leukocyte count and a higher frequency of lymphadenopathy than did children whose blast cells were characteristic of myeloid leukemia. Patients with CD2+ AML also had poorer responses to remission induction therapy (50% v 80% entered complete remission, P = .05). However, each of the five children who failed induction chemotherapy on AML protocols had a striking response to drug combinations usually reserved for lymphoid leukemia. We conclude that this leukemia with mixed lymphoid and myeloid characteristics is a distinct biologic and clinical entity. Volume 72, Issue 2, pp. 579-587, 08/01/1988 Copyright © 1988 by The American Society of Hematology CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this? This article has been cited by other articles: B. J. Wouters, M. A. Jorda, K. Keeshan, I. Louwers, C. A. J. Erpelinck-Verschueren, D. Tielemans, A. W. Langerak, Y. He, Y. Yashiro-Ohtani, P. Zhang, et al. Distinct gene expression profiles of acute myeloid/T-lymphoid leukemia with silenced CEBPA and mutations in NOTCH1 Blood, November 15, 2007; 110(10): 3706 - 3714. [Abstract] [Full Text] [PDF]

	Copyright © 1988 by American Society of Hematology         Online ISSN: 1528-0020