Lymphocytopenia laboratory findings

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Laboratory Findings

• Lymphocytopenia is diagnosed from the results of a complete blood count.

• In adults, a lymphocyte level below 1.500 cells/microliter is suspected and below 1000 cells/microliter is diagnostic.

• In children, a lymphocyte level below 3.000 cells/microliter is diagnostic.