IHC Marker - CA 19.9 Test: Booking, Price, and Results
About IHC Marker - CA 19.9 Test: Booking, Price, and Results
| Find | Value |
|---|---|
| Also Known As | CA 19-9 IHC, Carbohydrate antigen 19-9 Immunohistochemistry, CA 19.9 Tissue marker, Sialyl Lewis A IHC |
| Sample Type | Formalin-fixed, paraffin-embedded (FFPE) tissue block |
| Fasting Required | No fasting required |
| Report Time | 3 days |
| Recommended For | Adults of all genders with suspected gastrointestinal or pancreatic malignancies |
| Price | Starting at ₹1,920 |
What is an IHC Marker - CA 19.9 Test?
The IHC Marker – CA 19-9 test looks for CA 19-9, a protein that may be found in some types of tumours in a tissue sample. This test is performed on a biopsy or surgical sample of tissue to help doctors determine and classify some cancers, especially cancers of the digestive system and bile ducts. This test is also called CA 19-9 IHC or the CA 19-9 Tissue Marker Test.
What Does an IHC Marker - CA 19.9 Test Measure?
The IHC marker - CA 19.9 test analyses the tissue sample for several key features. These findings help the pathologist (a specialist doctor who examines tissue samples) form a diagnosis.
The test evaluates the following:
| Parameter | What It Measures |
|---|---|
| CA 19-9 Protein Expression | Whether the CA 19-9 antigen is present in the tissue cells |
| Staining Intensity | Whether the staining is weak, moderate, or strong indicates how much protein is produced |
| Staining Pattern and Location | Where the protein is found within the cell, such as in the cytoplasm (cell body) or on the cell membrane, which provides additional diagnostic information |
Why is an IHC Marker - CA 19.9 Test Done?
Doctors request this test when tissue already collected through a biopsy or surgery needs further analysis. The results help identify the type and origin of abnormal cells.
Common Symptoms That May Require This Test
A doctor may recommend this test when a patient presents with symptoms suggestive of a possible gastrointestinal or pancreatic (digestive system) condition. These symptoms include:
- Persistent abdominal pain or discomfort
- Unexplained weight loss
- Jaundice (yellowing of the skin and eyes)
- Nausea and vomiting
- Loss of appetite
- Changes in stool colour
- Unexplained back pain
Conditions This Test Can Help Detect
The CA 19-9 IHC test can support the diagnosis of several conditions. These include:
- Pancreatic adenocarcinoma (cancer of the pancreas)
- Bile duct carcinoma (cancer of the bile duct)
- Adenocarcinomas of the stomach, colon, and gallbladder
- Transitional cell carcinomas of the bladder (a type of bladder cancer that starts in the bladder lining)
- Ovarian and endometrial carcinomas
- Lung and thyroid carcinomas (cancer)
IHC Marker - CA 19.9 Test for Chronic Disease Monitoring
This test may be used to assess how a patient's cancer is responding to treatment. High CA 19-9 expression in tissue (measured by a scoring method) has been associated with poorer outcomes in certain cancers. In some cases, the test may be repeated on tissue collected at different stages of treatment to track changes in protein expression over time.
How to Prepare and What to Expect
The IHC marker - CA 19.9 test procedure is performed entirely in the laboratory on a tissue sample. No special preparations are needed from the patient for IHC testing.
Do You Need to Fast?
No, fasting is not required. Since this test is performed on tissue already collected via biopsy or surgery, you do not need to make any dietary changes before the test is processed.
Practical Tips Before Your Test
While fasting is not needed, there are a few steps to take before your test appointment:
- Bring a detailed clinical history, including your symptoms, previous test results, and family history, as this is required for the test
- Carry any previous biopsy or histopathology reports, as well as imaging results (such as CT scans or MRI reports)
- Inform your doctor about all medications you are currently taking
- Be aware that the tissue sample itself must already be collected through a biopsy or surgical procedure before this test can be performed
Step-by-Step Procedure
The IHC marker - CA 19.9 test procedure involves laboratory processing of collected tissue. Here is what happens at each stage:
- A tissue sample previously obtained through a biopsy or surgery is prepared for analysis
- The tissue is processed as a formalin-fixed, paraffin-embedded (FFPE) block, or as unstained slides cut at a standard thickness of 4 to 5 microns
- Tissue sections are mounted on special glass slides and undergo a process called antigen retrieval, which exposes the CA 19-9 protein so it can be detected
- A specialised antibody that binds specifically to the CA 19-9 antigen is applied to the tissue
- The laboratory uses immunohistochemistry (IHC) techniques to visualise the location and intensity of staining under a microscope
- A qualified pathologist reviews the stained slides and prepares the report, which is typically delivered within 3 days
Factors That Can Affect Accuracy
Certain factors may influence how clearly the test results can be read. These include:
- Poor tissue fixation quality (how the tissue was preserved after collection)
- The method used for antigen retrieval in the laboratory
- The thickness of the tissue sections on the slides
- Antibody specificity and incubation time during the staining process
- Excessive formalin fixation, which may cause irregular staining of connective tissue
- Necrotic (dead) or degenerated cells, which can stain non-specifically
Understanding Your IHC Marker - CA 19.9 Test Results
Results from the CA 19-9 IHC test are assessed by an expert and must always be reviewed alongside your clinical history, imaging findings, and other laboratory results. The table below outlines what different staining results generally indicate.
| Parameter | Reference/ Interpretation |
|---|---|
| CA 19-9 IHC Staining | Negative or weak staining- Typically seen in normal tissues; minor weak positivity may occur in normal ductal epithelium |
| Strong/diffuse positive staining | Widespread staining present- may indicate cancer, most common in pancreatic (94%), bile duct (91%), and transitional cell (76%) carcinomas |
| Weak or absent staining | Negative or minimal- generally seen in benign tissue, hepatocellular carcinoma, renal cell carcinoma, and prostatic adenocarcinoma (positive in only 2 to 6%) |
These interpretations are general. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
Certain conditions can affect how results are interpreted:
- Some people do not naturally produce the CA 19-9 protein. In these people, the test may be negative even though cancer is present
- Patients with chronic pancreatitis, obstructive jaundice, liver cirrhosis, or certain lung disorders may show positive staining without a malignant (cancer) cause, which can make interpretation more complex
How to Maintain Healthy Levels
While IHC results are based on tissue analysis rather than lifestyle factors, the following general habits support digestive health:
- Eat a balanced diet that includes fruits, vegetables, and whole grains to support overall gastrointestinal health
- Avoid smoking and limit alcohol intake, as both are linked to a higher risk of pancreatic and gastrointestinal cancers
- Attend regular health check-ups, especially if you have a family history of gastrointestinal or pancreatic conditions
Lupin Diagnostics IHC Marker - CA 19.9 Test Price
The IHC marker - CA 19.9 test cost at Lupin Diagnostics starts at ₹1,920. Please note that this test requires a visit to a Lupin Diagnostics centre, as home collection is not available for tissue-based tests.
| City | Approximate price(₹) |
|---|---|
| BHOPAL | 1920 |
| CHENNAI | 1920 |
| HYDERABAD | 1920 |
| KOLKATA | 1920 |
| NAVI MUMBAI | 1920 |
| PUNE | 1920 |
Disclaimer: Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Booking your IHC marker - CA 19.9 test online is straightforward. Follow these steps:
- Select the test on the Lupin Diagnostics website
- Choose your city and preferred centre location
- Visit the centre at your scheduled time for sample submission
- Receive your report via email or WhatsApp within the stipulated turnaround time
Frequently Asked Questions
The CA 19-9 blood test measures the level of CA 19-9 in the blood, while the CA 19-9 IHC test checks for this protein directly in a tissue sample. The tissue-based test helps confirm whether tumour cells are actually producing this marker, providing information that a blood test alone cannot offer.
No. While it shows positive staining in around 94% of pancreatic adenocarcinomas, it can also be positive in cancers of the bile duct, stomach, colon, bladder, ovaries, endometrium, lungs, and thyroid. It is not a test for pancreatic cancer alone.
The tissue sample is collected through a biopsy procedure (such as a fine needle aspiration, core biopsy, or endoscopic biopsy) or from a tumour removed during surgery. This step is performed separately by your treating doctor before the IHC test.
Not necessarily. A positive CA 19-9 IHC result does not automatically confirm cancer. Conditions such as chronic pancreatitis, obstructive jaundice, and liver disease can also produce positive staining. Your doctor will review the result alongside all other clinical and diagnostic findings before drawing any conclusions.
The report is typically ready within 3 days of the sample being received in the laboratory. Turnaround time may vary slightly depending on the workload at the processing laboratory.
No fasting is required. There are no dietary restrictions or preparation steps needed on the day of submission.
IHC Marker - CA 19.9 Test: Booking, Price, and Results
