What's this test for?

This test is ideal if you're following up on an abnormal biopsy or tissue sample and need to identify what type of cells are present. CD8 is a marker found on certain immune cells, and this test uses a special staining technique to detect it in a tissue sample. It's typically ordered as part of a broader workup to characterize cells of concern, often related to blood or immune system conditions.

What's included in this test?

This test looks specifically at the CD8 marker, a protein found on the surface of certain immune cells, using a lab technique called immunohistochemistry (IHC) that stains tissue samples to reveal specific markers. Identifying whether CD8 is present or absent helps distinguish between different types of cells, which is useful when investigating unusual cell growth or immune system activity.

What happens after I get my results?

Your results will be available in your account, with an explanation of what the CD8 marker presence or absence means for the sample tested. Since this is a specialized diagnostic test, next steps usually depend on the specific findings and may involve additional marker testing to fully characterize the cells in question. You can download the full lab report directly from your account at any time. If you retest in the future, you'll be able to track and compare results over time using the trends feature.

Who should consider this test?

This test is generally considered when unusual cells or tissue changes have already been identified and more detail is needed to understand what type of cells they are. It's commonly used as a follow-up step rather than a first-line screening test. People working through a diagnostic process involving unexplained lymph node swelling, unusual blood cell counts, or tissue abnormalities may need this type of marker testing.

How can I naturally support a healthy immune system?

While this test itself is diagnostic and not something lifestyle changes can directly affect, supporting your overall immune health is always a good idea. Getting consistent sleep, eating a diet rich in fruits, vegetables, and lean protein, staying physically active, and managing stress all help your immune system function well. Avoiding smoking and limiting alcohol also supports healthier immune cell activity over time.

When will I get my results?

Results for this test are typically ready within about 7 days. Because this test involves specialized tissue staining and interpretation, it takes a bit longer than routine blood work. You'll receive a notification as soon as your results are available in your account.

What is CD8 and why does it matter?

CD8 is a protein marker found on the surface of a specific type of immune cell that helps your body fight infections and abnormal cells. Detecting whether CD8 is present on cells in a tissue sample helps identify what kind of cells are being examined. This information is a key piece of the puzzle when investigating unusual cell growth or immune-related conditions.

What does it mean if CD8 is present in my sample?

If CD8 is detected, it means the cells being examined carry this specific immune cell marker, which helps narrow down what type of cells they are. This finding is usually interpreted alongside other markers and clinical information rather than on its own. The full report explains what the presence of this marker suggests in the context of your specific sample.

What causes abnormal CD8 marker results?

Changes in CD8 marker patterns can be related to a variety of immune system conditions, infections, or abnormal cell growth. Because this marker is just one piece of a larger diagnostic picture, the reason behind a particular result depends heavily on why the test was ordered in the first place. The report will provide context specific to your sample.

What should I do if my results are unclear or concerning?

If your results raise questions, the lab report will explain what the finding means and often what type of additional testing might help clarify the picture. Many IHC marker tests are run as a panel, so additional related markers may need to be ordered to build a complete picture. If you're experiencing severe or worsening symptoms, seek medical care promptly.

Getting your blood test with us is easy, private & backed by the power of science.Long story short: In the test options, use the filters or search box to narrow your choices and find the test you want. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

How do I know which test to get?

In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option. Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.

When will my lab results be available?

Most test results will be available within 1–3 business days. Once they're ready, we'll send an email and text message to let you know. After your blood draw, just hang tight and don't worry – we'll keep you updated and in the loop! If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com, and we'll gladly help you.

Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?

Absolutely! We totally understand that errors can happen. No worries, we're here to help you. Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you. There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out. Our lab requires an address to be listed to generate an order.

Do you accept health insurance?

Only HSA & FSA is accepted. Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts. This policy applies to all insurance companies, including federal health insurance programs like Medicare. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

Can I cancel my order?

Yes. We get it – sometimes your needs change. As long as your samples haven’t been collected yet, we’re happy to help you cancel your order. If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com. You can read more about our cancellation policy here.

How can I find a lab location near me?

During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp). Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

CD8 IHC Test - Immune Cell Marker Analysis

Getting your blood test with us is easy, private & backed by the power of science.

Long story short:

In the test options, use the filters or search box to narrow your choices and find the test you want.
If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!

754-799-7833

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