<unk> , or lymphopenia, is the condition of having an abnormally low level of lymphocytes in the blood. Lymphocytes are a white blood cell with important functions in the immune system. The opposite is lymphocytosis, which refers to an excessive level of lymphocytes.
Lymphocytopenia
Thrombocytopenia
Lymphocytosis
Monocytosis
Neutropenia
Leukocytosis
Splenomegaly
Hypogammaglobulinemia