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  2. Reactive lymphocyte - Wikipedia

    en.wikipedia.org/wiki/Reactive_lymphocyte

    Reactive lymphocyte surrounded by red blood cells. In immunology, reactive lymphocytes, variant lymphocytes, atypical lymphocytes, Downey cells or Türk cells are cytotoxic (CD8 +) lymphocytes that become large as a result of antigen stimulation. Typically, they can be more than 30 μm in diameter with varying size and shape.

  3. Lymphoproliferative disorders - Wikipedia

    en.wikipedia.org/wiki/Lymphoproliferative_disorders

    Children with common variable immunodeficiency (CVID) are also at a higher risk of developing a lymphoproliferative disorder. [ citation needed ] Some disorders that predispose a person to lymphoproliferative disorders are severe combined immunodeficiency (SCID), Chédiak–Higashi syndrome , Wiskott–Aldrich syndrome (an X-linked recessive ...

  4. Epstein–Barr virus–associated lymphoproliferative diseases

    en.wikipedia.org/wiki/Epstein–Barr_virus...

    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).

  5. Lymphocytosis - Wikipedia

    en.wikipedia.org/wiki/Lymphocytosis

    In adults, absolute lymphocytosis is present when the lymphocyte count is greater than 5000 per microliter (5.0 x 10 9 /L), in older children greater than 7000 per microliter and in infants greater than 9000 per microliter. [1] Lymphocytes normally represent 20% to 40% of circulating white blood cells. When the percentage of lymphocytes exceeds ...

  6. White blood cell differential - Wikipedia

    en.wikipedia.org/wiki/White_blood_cell_differential

    A white blood cell differential is a medical laboratory test that provides information about the types and amounts of white blood cells in a person's blood. The test, which is usually ordered as part of a complete blood count (CBC), measures the amounts of the five normal white blood cell types – neutrophils, lymphocytes, monocytes, eosinophils and basophils – as well as abnormal cell ...

  7. Follicular hyperplasia - Wikipedia

    en.wikipedia.org/wiki/Follicular_hyperplasia

    Children often experience reactive lymph nodes when they are younger due to new exposure of environmental pathogens, even without development of an infection. [ medical citation needed ] Clinically, follicular hyperplasia lymphadenopathy is usually restricted to a single area on the body, but can also be on several parts of the body as well.

  8. Lymphomatoid papulosis - Wikipedia

    en.wikipedia.org/wiki/Lymphomatoid_papulosis

    Similar to CD8+ epidermotropic cutaneous T-cell lymphoma, with large CD8+ and CD30+ lymphocytes that often stain with cytotoxic markers (TIA-1, granzyme, perforin). E Angioinvasive with small to large angiocentric CD30+ atypical lymphocytes that invade walls of small to medium vessels in dermis or subcutaneously.

  9. List of primary immunodeficiencies - Wikipedia

    en.wikipedia.org/wiki/List_of_primary_immuno...

    In these disorders both T lymphocytes and often B lymphocytes, regulators of adaptive immunity, are dysfunctional or decreased in number. The main members are various types of severe combined immunodeficiency (SCID). [7] T-/B+ SCID (T cells predominantly absent): γc deficiency

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