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Lymphoproliferative disorders are a set of disorders characterized by the abnormal proliferation of lymphocytes into a monoclonal lymphocytosis. The two major types of lymphocytes are B cells and T cells , which are derived from pluripotent hematopoietic stem cells in the bone marrow .
Cases of non-CLL/SLL MBL in which the monoclonal B cells do not express CD5, CD23, CD10, or CD103 but strongly express CD79B and light chain Ig have been tentatively designated as having monoclonal B-cell lymphocytosis of the marginal zone (i.e. CBL-MZ). This term is used because normal marginal zone B-cell lymphocytes express these markers.
In hematology, plasma cell dyscrasias (also termed plasma cell disorders and plasma cell proliferative diseases) are a spectrum of progressively more severe monoclonal gammopathies in which a clone or multiple clones of pre-malignant or malignant plasma cells (sometimes in association with lymphoplasmacytoid cells or B lymphocytes) over-produce and secrete into the blood stream a myeloma ...
In immunology, immunoproliferative disorders are disorders of the immune system that are characterized by the abnormal proliferation of the primary cells of the immune system, which includes B cells, T cells and natural killer (NK) cells, or by the excessive production of immunoglobulins (also known as antibodies). [citation needed]
[20] [21] CLL/SLL MBL consist of two groups: low-count CLL/SLL MBL has monoclonal B-cell blood counts of <0.5x10 9 cells/liter (i.e. 0.5x10 9 /L) while high-count CLL/SLL MBL has blood monoclonal B-cell counts ≥0.5x10 9 /L but <5x10 9 /L. [22] Individuals with blood counts of these monoclonal B-cells >5x10 9 /L are diagnosed as having CLL ...
Recently, however, monoclonal B-cells with some key characteristics of the malignant B-cells in FL or MCL have been found to accumulate in one or more lymphoid tissues. These accumulations are localized, non-destructive (i.e. not effacing a tissue's normal architecture), premalignant, and therefore now regarded as in situ disorders similar to ...
Burkitt's lymphoma is a cancer of the lymphatic system, particularly B lymphocytes found in the germinal center.It is named after Denis Parsons Burkitt, the Irish surgeon who first described the disease in 1958 while working in equatorial Africa.
Epstein–Barr virus–associated lymphoproliferative diseases (also abbreviated EBV-associated lymphoproliferative diseases or EBV+ LPD) are a group of disorders in which one or more types of lymphoid cells (a type of white blood cell), i.e. B cells, T cells, NK cells, and histiocytic-dendritic cells, are infected with the Epstein–Barr virus (EBV).
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