LaBaron T. Washington

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Bone marrow hematogones (B-lymphocyte precursors) may cause problems in diagnosis because of their morphologic and immunophenotypic similarities to neoplastic lymphoblasts. The purposes of this prospective, multiparametric flow cytometry study were to quantify hematogones across age groups and a spectrum of clinical conditions, to identify factors that(More)
Background: Abnormal variations in the expression level of some commonly expressed T-cell antigens are a feature of many T-cell malignancies. Methods: We sought to assess the frequency of such abnormal antigen expression by flow cytometry in peripheral blood (PB) samples from patients with mycosis fungoides (MF) and Sézary syndrome (SS). We correlated(More)
We report flow cytometric characterization of surface CD26 expression in 271 peripheral blood samples from 154 patients evaluated for the presence of a T-cell lymphoproliferative disorder, primarily mycosis fungoides/Sézary syndrome (MF/SS). The presence of morphologically identifiable tumor cells on peripheral blood smears was the criterion for(More)
The 5q-syndrome has been recognized as a distinct subtype of myelodysplastic syndrome (MDS) with characteristic clinical and pathologic features. Nevertheless, the definition of this syndrome is imprecise. To better understand how the 5q-syndrome is related to other "5q- only" myeloid disorders, we searched our conventional cytogenetics file for cases with(More)
The current World Health Organization (WHO) classification of hematopoietic malignancies defines several types of mature T-cell leukemia including T-cell prolymphocytic leukemia (T-PLL), Sezary syndrome (SS), and T-cell large granular lymphocytic (T-LGL) leukemia. These neoplasms can show overlapping features with each other and with T-cell lymphomas(More)
The WHO classification of hematological malignancies includes 5q-syndrome as a separate category within myelodysplastic syndromes (MDS). Clinically, patients with 5q-syndrome have a milder disease than patients with other MDS. The basis for this difference is not known. Identifying 5q-syndrome can be difficult because some of its morphologic and cytogenetic(More)
The current World Health Organization (WHO) classification of hematopoietic malignancies defines several types of mature T-cell leukemia including T-cell prolymphocytic leukemia (T-PLL), Sezary syndrome (SS), and T-cell large granular lymphocytic (T-LGL) leukemia. These neoplasms can show overlapping features with each other and with T-cell lymphomas(More)
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