Lymphocyte Count in Granulocyte-Rich Blood Sample
This test measures the proportion of lymphocytes (a type of white blood cell) within a sample that also contains a higher-than-normal presence of granulocytes (another type of white blood cell). It helps assess immune function and potential infections or inflammatory conditions.
["This test helps doctors understand how your immune system is balancing different white blood cell types."]
Key facts at a glance
- LOINC
- 35082-7
- Short code
- Lg Gran Lymphs # Bld
- Synonyms
- Lg Gran Lymphs # Bld
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like frequent infections, unexplained fatigue, or signs of an overactive immune response. It could also be part of a broader blood workup for conditions like leukemia, autoimmune diseases, or immune deficiencies.
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. It usually takes a few minutes, and you may feel a brief pinch. If you’re on blood thinners, let your provider know before the test.
What the Results Mean
A high proportion of granulocytes relative to lymphocytes might suggest an infection, inflammation, or a condition like chronic granulomatous disease. A low lymphocyte count could indicate immune suppression, certain cancers, or long-term stress on your immune system. Your provider will interpret results in the context of your overall health.
Common Conditions This Test Helps Diagnose
This test can help diagnose or monitor conditions such as infections (like tuberculosis or bacterial infections), certain cancers (like leukemia), autoimmune diseases (like rheumatoid arthritis), or immune deficiencies (like HIV). It may also be used to evaluate response to treatments.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal results may indicate an imbalance in your immune system. For example, a high granulocyte-to-lymphocyte ratio could signal acute infection or inflammation, while a low lymphocyte count may suggest immune dysfunction or chronic illness. Your provider will use these findings alongside other tests and symptoms to guide treatment.
Short name
Granulocyte Lymphocyte Differential (Blood)
Frequently asked questions
Will this test show if I have a virus like COVID-19?
Can I eat or drink before this test?
How long will I have to wait for my results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy