Blood smear examination for white blood cell morphology (lymphocyte count and differential analysis)

Why This Test Is Done

Your healthcare provider may order this test to evaluate your immune system, diagnose infections (such as viral or bacterial), or check for conditions like leukemia, lymphoma, or other blood disorders. It’s also used to monitor treatment responses in certain diseases.

What to Expect Before the Test

No special preparation is needed. A simple blood draw from your arm is all that’s required. The sample is then examined under a microscope by a trained lab professional.

What the Test Results Mean

Results typically show the types and proportions of white blood cells (e.g., lymphocytes, neutrophils, eosinophils). Abnormal counts or shapes may indicate infections, immune disorders, or other health issues. Your provider will interpret these findings in the context of your overall health.

Common Conditions Monitored

This test is often used to diagnose or monitor conditions like chronic infections, autoimmune diseases, or blood cancers. For example, high lymphocyte counts might suggest a viral infection or certain cancers, while unusual cell shapes could point to disorders like leukemia.