Lymphocytopenia

[Britney]

Lymphocytopenia is an abnormally low number of lymphocytes (a type of white blood cell) in the blood.

Many disorders can decrease the number of lymphocytes in the blood, but viral infections (including AIDS) and undernutrition are the most common.
People may have no symptoms, or they may have fever and other symptoms of an infection.
A blood sample is used to make the diagnosis of lymphocytopenia, but a sample of bone marrow or lymph node may be needed to determine the cause.
Doctors treat the cause of lymphocytopenia.
Some people are given gamma globulin, and some benefit from stem cell transplantation.

Lymphocytes are a type of white blood cell that plays several roles in the immune system, including protection against bacteria, viruses, fungi, and parasites. Lymphocytes usually constitute 20 to 40% of all white blood cells in the bloodstream. The lymphocyte count is normally above 1,500 cells per microliter of blood (1.5