What's this test for?

This test is ideal if you're working through a lung cancer diagnosis and need to know exactly which type of cancer cell is involved. It's a specialized tissue stain used to tell squamous cell carcinoma apart from adenocarcinoma in the lung, which matters a lot because treatment options differ between the two. This test is typically ordered after a biopsy has already been taken, when more clarity is needed on the exact cell type.

What happens after I get my results?

Your results will be available in your account, with an explanation of what the finding means for identifying the cancer cell type. Because this is a specialized pathology stain, the next steps usually involve using this information alongside your other test and imaging findings to guide treatment planning. A downloadable standard lab report is provided in your account for your records, and you can track this along with any other related results over time using the trends feature.

What is p40 (IHC) and why does it matter?

p40 is a marker found on the surface of squamous and basal cells, and this test uses a special stain to detect it in a tissue sample. It matters because lung tumors can look similar under a microscope but behave very differently depending on their cell type, and this stain helps pinpoint whether a tumor is squamous cell carcinoma. Getting the cell type right is a key step in figuring out the most fitting treatment approach.

How can I naturally support my lung health?

While this test itself is diagnostic and not something lifestyle changes can affect, supporting your lungs overall can include avoiding smoking and secondhand smoke, staying active to keep lung capacity strong, and eating a diet rich in antioxidants from fruits and vegetables. Reducing exposure to air pollution and workplace irritants like dust or chemical fumes can also help protect lung tissue. These habits support general lung wellness but do not replace the diagnostic value of this specialized test.

When will I get my results?

Results for this specialized tissue stain typically take about 7 days to process. This is longer than routine blood work because it involves detailed laboratory analysis of the tissue sample by specially trained staff. You'll be notified as soon as your results are ready and viewable in your account.

Who should consider this test?

This test is generally considered for people who already have a lung biopsy or tissue sample that needs further classification. It's most relevant if there's uncertainty about whether a lung tumor is squamous cell carcinoma or another type like adenocarcinoma. This is a specialized follow-up test rather than a general screening test for the public.

What symptoms might lead someone toward lung tissue testing?

Symptoms like a persistent cough, coughing up blood, unexplained weight loss, chest pain, or shortness of breath are often what leads someone to get imaging and eventually a biopsy. If a biopsy shows an abnormal growth, tests like this one help clarify exactly what type of cells are involved. These symptoms alone don't confirm cancer, but they're often the starting point that leads to more detailed testing like this one.

What does a positive p40 result mean?

A positive p40 result means the marker was found in the tissue sample, which points toward squamous cell carcinoma rather than other lung cancer types. This helps narrow down the exact diagnosis so that a more fitting treatment path can be considered. It's one piece of a bigger picture that includes other stains and imaging results.

What does a negative p40 result mean?

A negative result means the marker wasn't detected in the sample, which makes squamous cell carcinoma less likely and points toward considering other cancer types, like adenocarcinoma. This result is usually looked at together with other markers run on the same tissue sample for a fuller picture. A negative result on its own doesn't rule out cancer entirely, just this specific cell type.

What should I do if my results are abnormal?

If your result comes back positive or unclear, the best next step is to use this information together with your other pathology and imaging results to understand the full picture. Because this relates to a cancer diagnosis, it's important to act on these results promptly rather than delay follow-up care. If you experience worsening symptoms like severe shortness of breath or coughing up significant blood, seek medical care right away.

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.

p40 IHC Test - Squamous Lung Cancer Marker

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

[email protected]

p40 (IHC) Test for Lung Cancer Type Diagnosis

p40, IHC with Interpretation

Prescription & fees included

Easy to understand results

Fast & convenient

Prescription & fees included

Easy to understand results

Fast & convenient

What's this test for?

What happens after I get my results?

What is p40 (IHC) and why does it matter?

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

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p40 (IHC) Test for Lung Cancer Type Diagnosis

Prescription & fees included

Easy to understand results

Fast & convenient

1,000,000+ blood tests later, here's what our customers say