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  2. Lymphocytic esophagitis - Wikipedia

    en.wikipedia.org/wiki/Lymphocytic_esophagitis

    uncertain; adults 0.1%, as high as 8.5% in children Lymphocytic esophagitis is a rare and poorly understood medical disorder involving inflammation in the esophagus . The disease is named from the primary inflammatory process, wherein lymphocytes are seen within the esophageal mucosa.

  3. 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.

  4. 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 ...

  5. Lymphoproliferative disorders - Wikipedia

    en.wikipedia.org/wiki/Lymphoproliferative_disorders

    The T cell variations are usually caused by the prolonged use of T cell suppressant drugs, such as sirolimus, tacrolimus, or ciclosporin. [2] The Epstein-Barr virus , which infects >90% of the world population, is also a common cause of these disorders, being responsible for a wide range of non-malignant, pre-malignant, and malignant Epstein ...

  6. Lymphocytic pleocytosis - Wikipedia

    en.wikipedia.org/wiki/Lymphocytic_pleocytosis

    A viral infection can directly cause encephalitis or trigger a cascade ending in autoimmunity, with both mechanisms eventually leading to a rise in CSF lymphocyte concentration. [ citation needed ] For patients with Herpes simplex virus , more than 90% are found to have lymphocytic pleocytosis of varying levels. [ 5 ]

  7. Childhood leukemia - Wikipedia

    en.wikipedia.org/wiki/Childhood_Leukemia

    Most initial symptoms of leukemia are related to problems with the bone-marrow function. There are a variety of symptoms that children may experience. The symptoms tend to appear quickly in acute leukemia and slowly over time in chronic leukemia. [1] Symptoms in the different types of childhood leukemia include: feelings of fatigue or weakness

  8. Duodenal lymphocytosis - Wikipedia

    en.wikipedia.org/wiki/Duodenal_lymphocytosis

    Duodenal lymphocytosis, sometimes called lymphocytic duodenitis, lymphocytic duodenosis, or duodenal intraepithelial lymphocytosis, is a condition where an increased number of intra-epithelial lymphocytes is seen in biopsies of the duodenal mucosa when these are examined microscopically.

  9. Follicular hyperplasia - Wikipedia

    en.wikipedia.org/wiki/Follicular_hyperplasia

    Follicular hyperplasia is common in children and young adults, but is not limited to any age; it is also common among the elderly and is non-sex specific. [1] Children often experience reactive lymph nodes when they are younger due to new exposure of environmental pathogens, even without development of an infection.

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