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  2. Chronic lymphocytic leukemia - Wikipedia

    en.wikipedia.org/wiki/Chronic_lymphocytic_leukemia

    Chronic lymphocytic leukemia (CLL) is a type of cancer in which the bone marrow makes too many lymphocytes (a type of white blood cell). [2] [8] Early on, there are typically no symptoms. [2] Later, non-painful lymph node swelling, feeling tired, fever, night sweats, or weight loss for no clear reason may occur.

  3. 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 ...

  4. Large granular lymphocytic leukemia - Wikipedia

    en.wikipedia.org/wiki/Large_granular_lymphocytic...

    Large granular lymphocytic (LGL) leukemia is a chronic lymphoproliferative disorder that exhibits an unexplained, chronic (> 6 months) elevation in large granular lymphocytes (LGLs) in the peripheral blood. [1] It is divided in two main categories: T-cell LGL leukemia (T-LGLL) and natural-killer (NK)-cell LGL leukemia (NK-LGLL).

  5. Lymphoproliferative disorders - Wikipedia

    en.wikipedia.org/wiki/Lymphoproliferative_disorders

    Lymphoproliferative disorders (LPDs) refer to a specific class of diagnoses, comprising a group of several conditions, in which lymphocytes are produced in excessive quantities. These disorders primarily present in patients who have a compromised immune system .

  6. Natural killer cell - Wikipedia

    en.wikipedia.org/wiki/Natural_killer_cell

    Natural killer cells, also known as NK cells, are a type of cytotoxic lymphocyte critical to the innate immune system.They are a kind of large granular lymphocytes [1] [2] (LGL), and belong to the rapidly expanding family of known innate lymphoid cells (ILC) and represent 5–20% of all circulating lymphocytes in humans. [3]

  7. Acute lymphoblastic leukemia - Wikipedia

    en.wikipedia.org/wiki/Acute_lymphoblastic_leukemia

    Normal lymphoblasts develop into mature, infection-fighting B-cells or T-cells, also called lymphocytes. Signals in the body control the number of lymphocytes so neither too few nor too many are made. In ALL, both the normal development of some lymphocytes and the control over the number of lymphoid cells become defective. [4] [24]

  8. Lymphocyte - Wikipedia

    en.wikipedia.org/wiki/Lymphocyte

    A lymphocyte is a type of white blood cell (leukocyte) in the immune system of most vertebrates. [1] Lymphocytes include T cells (for cell-mediated and cytotoxic adaptive immunity), B cells (for humoral, antibody-driven adaptive immunity), [2] [3] and innate lymphoid cells (ILCs; "innate T cell-like" cells involved in mucosal immunity and homeostasis), of which natural killer cells are an ...

  9. Childhood leukemia - Wikipedia

    en.wikipedia.org/wiki/Childhood_Leukemia

    [7] [2] ALL is a form of leukemia that affects lymphocytes, a type of white blood cells which fights infection. When a patient has ALL, the bone marrow makes too many immature white blood cells and they do not mature correctly. These white blood cells also do not work correctly to fight infection. The white blood cells overproduce, crowding the ...