1,258 Possible Causes for Lymphocytosis in USA

  • Influenza
    Lymphocytes Increased
  • Viral Lower Respiratory Infection


  • Follicular Lymphoma
    Lymphocytosis Lymphocytes Increased

    Marrow involvement common (85% have paratrabecular lymphoid aggregates); with marrow involvement, 40% have tumor cells in blood, which may resemble CLL 10% have peripheral lymphocytosis[pathologyoutlines.com] These may be memory B cells, circulating after initial stimulation In rare cases, can see pronounced peripheral blood B lymphocytosis (often secondary to infection), with[en.wikibooks.org]

  • Pharyngitis

    Lymphocytosis, along with greater than 10% atypical lymphocytes and mild thrombocytopenia, can be found in mononucleosis.[infectiousdiseaseadvisor.com] However, infectious mononucleosis is more common in persons 10 to 30 years of age and is associated with fatigue, posterior cervical adenopathy, and atypical lymphocytosis[aafp.org] PTx, formerly known as lymphocytosis -promoting factor, causes a decrease in the entry of lymphocytes into lymph nodes.[boundless.com]

  • Drug-induced Fever

    Eosinophilia and atypical lymphocytosis are common, occurring in up to 30% of cases. 2 Allopurinol, anticonvulsants (particularly carbamazepine, phenobarbitone and phenytoin[medsafe.govt.nz] The hematologic abnormalities of DHS generally consist of eosinophilia, atypical lymphocytosis, lymphopenia and thrombocytopenia ( 16 ).[jpediatricsreview.com] Testing for acute CMV, acute EBV, or acute HSV infection should be undertaken if classical viral hepatitis has been excluded or clinical features such as atypical lymphocytosis[gi.org]

  • Infectious Mononucleosis
    Lymphocytes Increased

    Common laboratory findings in patients with IM include marked lymphocytosis with atypical lymphocytes [ 2 ].[journalmc.org] Atypical lymphocytosis and a positive heterophile antibodies test are usually observed.[us.bestpractice.bmj.com] Diagnosis is usually through serum labwork which would show lymphocytosis and a positive heterophile antibody test.[radiopaedia.org]

  • Mycoplasma Infection
    Lymphocytes Increased
  • Niacin
    Lymphocytes Increased
  • Syphilis
    Lymphocytes Increased
  • Immune Thrombocytopenic Purpura
    Lymphocytes Increased

    […] return to top Investigations lab investigations diagnostic imaging Lab Investigations CBC thrombocytopenia (often 5,000-75,000) occasional lymphocytosis anemia Peripheral[sharinginhealth.ca]

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