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  • Title: Identification of circulating CD10 positive T cells in angioimmunoblastic T-cell lymphoma.
    Author: Baseggio L, Berger F, Morel D, Delfau-Larue MH, Goedert G, Salles G, Magaud JP, Felman P.
    Journal: Leukemia; 2006 Feb; 20(2):296-303. PubMed ID: 16341050.
    Abstract:
    In most cases of lymphomas with blood dissemination, the careful cytological analysis of peripheral blood smears provides a rapid orientation to diagnosis, even if the final subtyping is achieved by histology and eventually other techniques. Here, we evaluated if the analysis of blood smears may suggest the blood dissemination of angioimmunoblastic T-cell lymphoma (AITL) and if CD10 expression on neoplastic T cells, as recently reported on AITL, may contribute to the diagnosis. In all, 11 lymph nodes and six peripheral blood samples from 12 patients with AITL were studied using four-colour flow cytometry associated to histological, cytological and molecular data. According to previous results, a fraction of T cells expressed CD10 in 10/11 lymph nodes. Interestingly, all blood smears showed atypical lymphoid cells and a fraction of T cells expressed CD10 with a mean percentage of 18.75% (range 5.00-47.00%), regardless of lymphocytosis level and of rate of CD10 T cells in corresponding lymph node. In contrast, in all control samples (100), none CD10-positive T cell was identified. This is to our knowledge the first description of circulating CD10 neoplastic T cells in AITL. Therefore, they ought to be explored in further studies when aggressive lymphoma, in particular with lymphopenia and circulating atypical cells, is suspected.
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