Possible Causes for Lymphocytosis in USA

  • Follicular Lymphoma
    Lymphocytes Increased Lymphocytosis

    Follicular lymphoma is a common type of non-Hodgkin lymphoma. In most cases, follicular lymphoma shows a painless, slow and progressive adenopathy. Systemic symptoms like fever, night sweats and weight loss is not seen at presentation most of the time but it can be seen in later stages of the disease. Progression to…[1]

  • Influenza
    Lymphocytes Increased

    Influenza is acommon infectious disease caused by the Influenza virus. Onset is sudden with fever, rhinorrhea, sore throat and headache. Severe myalgias coupled with respiratory tract symptoms are typical of influenza. Patients may also have red, watery eyes and cough. There can also be tachycardia and dyspnea…[2]

  • Infectious Mononucleosis
    Lymphocytes Increased

    Blood smear may reveal lymphocytosis. … Blood work usually reveals presence of lymphocytosis and the diagnosis is confirmed with the Monospot test. … Lymphocytosis and thrombocytopenia alone are not confirmative for infectious mononucleosis because such a finding can be seen with many other noninfectious causes (malignancies … [3]

  • Acute Infectious Lymphocytosis
    Lymphocytes Increased
  • Chronic Lymphocytic Leukemia
    Lymphocytes Increased

    Stage III: Absolute lymphocytosis with anemia is present. … Stage I: Lymphocytosis along with lymphadenopathy is present. … Stage IV: Absolute lymphocytosis with thrombocytopenia (<100,000/mm3).[4]

  • Pertussis
    Lymphocytes Increased

    A lymphocytosis promoting factor probably plays an important role. … Blood reports will show lymphocytosis due to elaboration of lymphocyte promoting factor which is a characteristic of B. petussis.[5]

  • Rickettsialpox
    Lymphocytes Increased

    Although laboratory tests are not diagnostic, a complete blood count with differential count may reveal leukopenia with relative lymphocytosis, and thrombocytopenia while … [6]

  • Prolymphocytic Leukemia
    Lymphocytes Increased

    A complete blood count (CBC) is the cornerstone of the laboratory workup, showing profound lymphocytosis (over 100 × 109/L), whereas anemia/thrombocytopenia is observed in … [7]

  • Mumps
    Lymphocytes Increased

    Blood tests demonstrate a relative lymphocytosis is seen in case of mumps infection.[8]

  • Addison's Disease
    Lymphocytes Increased

    Eosinophilia and lymphocytosis (increased number of eosinophils or lymphocytes, two types of white blood cells) Metabolic acidosis (increased blood acidity), also is due to … [9]

Further symptoms


  1. Follicular Lymphoma, Symptoma
  2. Influenza, Symptoma
  3. Infectious Mononucleosis, Symptoma
  4. Chronic Lymphocytic Leukemia, Symptoma
  5. Pertussis, Symptoma
  6. Rickettsialpox, Symptoma
  7. Prolymphocytic Leukemia, Symptoma
  8. Mumps, Symptoma
  9. Addison's disease, Wikipedia, CC-BY-SA-3.0