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  2. Idiopathic CD4+ lymphocytopenia - Wikipedia

    en.wikipedia.org/wiki/Idiopathic_CD4...

    The mandatory criteria for diagnosis of idiopathic CD4+ lymphocytopenia include: [8] Low numbers of CD4+ cells, on two or more measurements over at least six weeks: CD4 cell count less than 300 cells per microliter, or; Less than 20% of T lymphocytes are CD4+ Laboratory evidence of lack of HIV infection

  3. List of ICD-9 codes 240–279: endocrine, nutritional and ...

    en.wikipedia.org/wiki/List_of_ICD-9_codes_240...

    This is a shortened version of the third chapter of the ICD-9: Endocrine, Nutritional and Metabolic Diseases, and Immunity Disorders. It covers ICD codes 240 to 279 . The full chapter can be found on pages 145 to 165 of Volume 1, which contains all (sub)categories of the ICD-9.

  4. List of ICD-9 codes 280–289: diseases of the blood and blood ...

    en.wikipedia.org/wiki/List_of_ICD-9_codes_280...

    This is a shortened version of the fourth chapter of the ICD-9: Diseases of the Blood and Blood-forming Organs. It covers ICD codes 280 to 289. The full chapter can be found on pages 167 to 175 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1.

  5. T helper cell - Wikipedia

    en.wikipedia.org/wiki/T_helper_cell

    Low CD4 + predicted greater likelihood of intensive care unit admission, and CD4 + cell count was the only parameter that predicted length of time for viral RNA clearance. [42] Despite the reduced levels of CD4 + , COVID-19 patients with severe disease had higher levels of T h 1 CD4 + cells than patients with moderate disease.

  6. Lymphocytopenia - Wikipedia

    en.wikipedia.org/wiki/Lymphocytopenia

    Lymphocytopenia is commonly caused by a recent infection, such as the common cold or COVID-19. [3]Lymphocytopenia, but not idiopathic CD4+ lymphocytopenia, is associated with corticosteroid use, infections with HIV and other viral, bacterial, and fungal agents, malnutrition, systemic lupus erythematosus, [4] severe stress, [5] intense or prolonged physical exercise (due to cortisol release ...

  7. Combined immunodeficiencies - Wikipedia

    en.wikipedia.org/wiki/Combined_immunodeficiencies

    When a clinical diagnosis of combined immunodeficiency is suspected, preliminary laboratory tests should be ordered. The patient's complete blood count (CBC) reveals immunological changes. The absolute neutrophil and lymphocyte count should be determined based on the patient's age. In all patients, HIV should be ruled out.

  8. Bare lymphocyte syndrome - Wikipedia

    en.wikipedia.org/wiki/Bare_lymphocyte_syndrome

    Bare lymphocyte syndrome, type II (BLS II) is a rare recessive genetic condition in which a group of genes called the major histocompatibility complex class II (MHC class II) are not expressed.

  9. Category:Immune system disorders - Wikipedia

    en.wikipedia.org/wiki/Category:Immune_system...

    Idiopathic CD4+ lymphocytopenia; Idiopathic multicentric Castleman disease; IgG4-related disease; Immune dysregulation; Immune reconstitution inflammatory syndrome; Immune-mediated inflammatory diseases; Immunoproliferative disorder; Inborn errors of immunity