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  2. 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 .

  3. Monoclonal B-cell lymphocytosis - Wikipedia

    en.wikipedia.org/.../Monoclonal_B-cell_lymphocytosis

    Individuals with MBL usually present with unexplained increases in blood lymphocyte counts (i.e. lymphocytosis). The most common causes for lymphocytosis are viral infections, autoimmune diseases (particularly connective tissue diseases), hypersensitivity reactions, acute stress reactions, and prior splenectomy. [9]

  4. 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.

  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. Hemophagocytic lymphohistiocytosis - Wikipedia

    en.wikipedia.org/wiki/Hemophagocytic_lymphohist...

    It is a life-threatening disease of severe hyperinflammation caused by uncontrolled proliferation of benign lymphocytes and macrophages that secrete high amounts of inflammatory cytokines. It is classified as one of the cytokine storm syndromes. There are inherited and non-inherited (acquired) causes of HLH.

  7. Infectious mononucleosis - Wikipedia

    en.wikipedia.org/wiki/Infectious_mononucleosis

    Usually, a person with IM has few, if any, further symptoms or problems from the latent B lymphocyte infection. However, in susceptible hosts under the appropriate environmental stressors, the virus can reactivate and cause vague physical symptoms (or may be subclinical), and during this phase, the virus can spread to others. [2] [68] [69]

  8. 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 ...

  9. Follicular hyperplasia - Wikipedia

    en.wikipedia.org/wiki/Follicular_hyperplasia

    Another indication of lymphoma compared to follicular hyperplasia is high levels of lactic dehydrogenase (LDH) and C-reactive proteins (CRP). [medical citation needed] A lymph node biopsy may reveal an official diagnosis for lymphoma, by ruling out follicular hyperplasia which can be determined by the rate of proliferation. [medical citation ...