Lymphocyte Count (Peripheral Blood, Automated Hematology)

Why This Test Is Done

Doctors order a lymphocyte count to assess your immune system. It may be used to diagnose or monitor conditions such as infections, autoimmune diseases, or blood disorders. It can also help guide treatment decisions, especially in cases involving chemotherapy or immune-related illnesses.

What to Expect Before the Test

No special preparation is needed for this test. You’ll have a small needle inserted into your arm or hand to draw a blood sample. The process usually takes a few minutes, and you may feel a brief pinch or sting.

What the Test Results Mean

Lymphocyte counts can vary based on health, age, and other factors. While your doctor will interpret the results in the context of your overall health, very high or very low counts may signal potential health concerns that need further evaluation.

Common Conditions Affecting Lymphocyte Counts

High lymphocyte counts might indicate chronic infections, certain cancers (like lymphoma), or overactive immune responses. Low counts could suggest infections, immune deficiencies, or conditions like leukemia or severe stress (e.g., trauma or surgery).