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  2. 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 ...

  3. Hemophagocytic lymphohistiocytosis - Wikipedia

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

    It can be dangerous to infer a genetic impairment of granule-mediated cytotoxicity in patients, especially older children and adults, who meet any of the various criteria for HLH. Thus, like shock , one must simultaneously manage both the acute physiologic changes associated with HLH (like systemic inflammation, DIC , hepatitis, etc.) and look ...

  4. 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 .

  5. List of hematologic conditions - Wikipedia

    en.wikipedia.org/wiki/List_of_hematologic_conditions

    Follicular lymphoma (also known as indolent follicular lymphoma) is a type of non-Hodgkin's lymphoma that involves both large and small B-cell lymphocytes that spreads from the lymphatic system and into the blood, bone marrow, and internal organs. Approximately 20 to 30 percent of non-Hodgkin's lymphomas are diagnosed as follicular lymphoma ...

  6. Chronic lymphocytic leukemia - Wikipedia

    en.wikipedia.org/wiki/Chronic_lymphocytic_leukemia

    In CLL, the lymphocytes are all genetically identical since they are derived from the same B cell lineage. CLL cells can express the typical B-cell markers such as CD19 and CD20, as well as abnormal surface markers such as CD5 and CD23. [32] On a peripheral blood smear, CLL cells resemble normal lymphocytes, although slightly smaller.

  7. 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 ...

  8. Acute lymphoblastic leukemia - Wikipedia

    en.wikipedia.org/wiki/Acute_lymphoblastic_leukemia

    Acute lymphoblastic leukemia (ALL) is a cancer of the lymphoid line of blood cells characterized by the development of large numbers of immature lymphocytes. [1] Symptoms may include feeling tired, pale skin color, fever, easy bleeding or bruising, enlarged lymph nodes, or bone pain. [1]

  9. Leukemoid reaction - Wikipedia

    en.wikipedia.org/wiki/Leukemoid_reaction

    Conventionally, a leukocytosis exceeding 50,000 WBC/mm 3 with a significant increase in early neutrophil precursors is referred to as a leukemoid reaction. [2] The peripheral blood smear may show myelocytes, metamyelocytes, promyelocytes, and rarely myeloblasts; however, there is a mixture of early mature neutrophil precursors, in contrast to the immature forms typically seen in acute leukemia.