A high lymphocyte count, also referred to as lymphocytosis, can be caused by acute lymphocytic leukemia, chronic lymphocytic leukemia, cytomegalovirus (CMV) infection, human immunodeficiency virus (HIV), mononucleosis, multiple myeloma, tuberculosis, vasculitis, whooping cough and other viral infections. In adults, a lymphocyte count significantly higher than 3,000 lymphocytes in a microliter of blood is generally considered to be lymphocytosis, according to the Mayo Clinic.Continue Reading
The Mayo Clinic explains that it is possible to have a high lymphocyte count and display no symptoms. If test results indicate a high lymphocyte count, a person's doctor may perform additional tests to determine if the lymphocyte count is harmless and temporary or it signals a more serious underlying issue, such as blood cancer or a chronic infection.
According to the Mayo Clinic, lymphocytes are an essential part of the immune system and help to rid the body of disease, so it is not uncommon for a high lymphocyte count to occur after an illness. It is rare that a high lymphocyte count is found randomly as it is normally discovered after a doctor has ordered tests to assess a pre-existing condition. Additional testing may not be required if the high lymphocyte count coincides with test results the doctor has already obtained.Learn more about Pain & Symptoms
A higher amount of reactive lymphocytes is seen in patients with viral illnesses such as infectious mononucleosis and viral hepatitis and infections with cytomegalovirus, HIV and rubella. Reactive lymphocytes with convoluted nuclei can been seen in patients with T-cell lymphomas or Sezary syndrome, states Edward C. Lynch in "Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd edition."Full Answer >
A high lymphocyte count, known as lymphocytosis, may indicate nothing at all or may indicate a condition such as cancer, explains Mayo Clinic. Often, lymphocytes in the blood are higher after an illness, which is a temporary, harmless situation.Full Answer >
A high lymphocyte count is an indicator of infection, autoimmune disorders and some types of cancer, explains Mayo Clinic. Lymphocytes are a type of white blood cell.Full Answer >
HealthCentral explains that lymphocytosis, or the presence of a high number of lymphocytes, can be caused by many different disorders and diseases, including mononucleosis, toxoplasmosis, AIDS and tuberculosis. In addition to these serious diseases, lymphocytosis can merely signal that a person is suffering from an upper respiratory infection or the after-effects of a traumatic injury. The condition can also indicate acute or chronic lymphocytic leukemia or lymphoma.Full Answer >