Lymphopenia is the condition in which there exists an abnormally low number of
lymphocytes in the
blood.Lymphopenia can be caused by various types of
chemotherapy, such as with cytotoxic agents or immunosuppresive drugs. Some malignancies in the
bone marrow will also cause lymphopenia.A decreased number of lymphocytes (notably
T cells) is present in those with
AIDS. People exposed to large doses of
radiation, such as those involved with
Chernobyl can also exhibit a lymphopenia.
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