Abstract
The simultaneous occurrence of polycythemia vera (PV) and chronic lymphocytic leukemia (CLL) is a rare event that offers a possibility to study their common origin. PV originates from self-renewing hematopoietic stem cells (HSC) with both lymphoid and myeloid potential(–3). It has been reported that CLL also originates from self-renewing HSC with a potential for both lymphoid and myeloid differentiation(4, 5). We report 3 females with concomitant CLL and PV whose X-chromosome inactivation patterns of the neoplastic cells revealed that granulocytes/platelets and B-lymphocytes used different X-chromosome alleles. These data indicate that both PV and CLL have arisen independently and from different HSC.
Publication types
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Case Reports
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Comparative Study
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Letter
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Aged
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Alleles
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Amino Acid Substitution
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B-Lymphocytes / metabolism
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Blood Platelets / metabolism
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Cell Lineage
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Cell Transformation, Neoplastic / genetics*
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Cell Transformation, Neoplastic / metabolism
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Clone Cells
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Female
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Granulocytes / metabolism
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Hematopoietic Stem Cells / metabolism*
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Hematopoietic Stem Cells / pathology
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Humans
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Janus Kinase 2 / genetics*
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Janus Kinase 2 / metabolism
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Leukemia, Lymphocytic, Chronic, B-Cell / blood
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Leukemia, Lymphocytic, Chronic, B-Cell / complications*
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Leukemia, Lymphocytic, Chronic, B-Cell / genetics
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Leukemia, Lymphocytic, Chronic, B-Cell / metabolism
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Mutation*
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Polycythemia Vera / blood
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Polycythemia Vera / complications*
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Polycythemia Vera / genetics*
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Polycythemia Vera / metabolism
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T-Lymphocytes / metabolism
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X Chromosome Inactivation
Substances
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JAK2 protein, human
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Janus Kinase 2