Lymphocytes are produced by lymphoid organs and are an important cellular component of the body’s immune response function by producing and transporting antibodies and defending against viral infections. An abnormal number of lymphocytes is often a sign of some serious diseases. High lymphocytes include both absolute and relative increases.
Absolute increase: to be seen in infectious diseases and mainly viral infections, such as: measles, chickenpox, mumps, viral hepatitis, epidemic hemorrhagic fever, but also in whooping cough, tuberculosis, brucellosis, syphilis, etc. The number of lymphocytes increases in these cases, as does the percentage. In addition, lymphocytosis can also occur in mature lymphocytic tumors (including leukemia with mature lymphocytes and some lymphomas), during recovery from acute infectious diseases, and after transplant rejection.
Relative increase: The relative increase in lymphocyte ratio is mainly due to a decrease in the number of other cells due to some causes, but the absolute value of lymphocytes is not increased, such as aplastic anemia, granulocytopenia, granulocyte deficiency, etc.
Therefore, high lymphocytes are often a sign of some serious diseases and need to be taken seriously, but there are many causes of high lymphocytes, and the diagnosis needs to be confirmed based on the patient’s clinical manifestations and further examinations.