IHC Marker-EMA Test
About IHC Marker-EMA Test
| Field | Value |
|---|---|
| Also Known As | EMA Immunostain, Epithelial Membrane Antigen IHC, MUC1 IHC, EMA Immunohistochemistry |
| Sample Type | Formalin-fixed, paraffin-embedded (FFPE) tissue block |
| Fasting Required | No fasting required |
| Report Time | 7 days |
| Recommended For | All genders and ages; ordered when a cancer or tumour diagnosis is suspected |
| Price | Starting at ₹1,920 |
What is an IHC Marker-EMA Test?
The IHC Marker-EMA Test is a specialised laboratory test that detects a protein called Epithelial Membrane Antigen (EMA) in tissue samples. EMA, also known as MUC1 or mucin 1, is found on the surface of cells that line organs and body surfaces. Doctors order this test to help identify the origin and type of a tumour when a biopsy has been performed. It is also referred to as EMA Immunostain or EMA Immunohistochemistry.
What Does an IHC Marker-EMA Test Measure?
This test uses the immunohistochemistry (IHC) method to detect the presence and distribution of EMA in preserved tissue. A pathologist examines the stained tissue under a microscope to interpret the results.
The key aspects assessed during the IHC Marker-EMA test are listed below.
| Component | What it Tells Us |
|---|---|
| EMA expression in tissue | Whether epithelial (surface-lining) cells are present in the tumour |
| Staining pattern | Helps distinguish carcinomas (epithelial cancers) from lymphomas and other tumour types |
| Staining intensity | Supports the assessment of tumour differentiation and origin |
EMA is expressed on epithelial cells, mesothelial cells (lining body cavities), perineural cells (surrounding nerves), and certain plasma cells (immune cells). The pattern of staining helps pathologists classify tumours accurately.
Why is an IHC Marker-EMA Test Done?
This test is requested when a tissue biopsy has been taken, and the pathologist needs more information to identify the type or origin of a tumour. It forms part of a broader panel of IHC markers used in cancer diagnosis.
Common Symptoms That May Require This Test
Your doctor may recommend this test after a biopsy if you have experienced any of the following symptoms.
- An unexplained lump or mass anywhere in the body
- Suspicious tissue growth detected on imaging (X-ray, CT scan, MRI)
- Abnormal findings on a prior biopsy that require further classification
- Signs of possible cancer spread (metastasis) to a new site
- Neurological symptoms where a meningioma (brain tumour) is suspected
- Fluid accumulation in body cavities without a clear cause
- A tumour of unknown origin that needs to be identified
Conditions This Test Can Help Detect
The IHC Marker-EMA test procedure helps pathologists identify or rule out a range of conditions. These include the following.
- Adenocarcinomas from various sites, including breast, lung, colon, kidney, ovary, and prostate
- Meningiomas (tumours arising from the membranes surrounding the brain and spinal cord)
- Synovial sarcoma and epithelioid sarcoma (soft tissue cancers)
- Anaplastic large cell lymphoma (a type of blood cancer)
- Transitional cell carcinoma of the urinary bladder
- Ependymomas (tumours of the brain and spinal cord)
- Abnormal cell growth in the linings of body cavities (malignant mesothelial proliferation)
How to Prepare and What to Expect
No special preparation is needed for this test, as the IHC Marker-EMA test procedure is performed entirely on a tissue sample already collected during a biopsy or surgery.
Do You Need to Fast?
No, fasting is not required for this test. The test is carried out in the laboratory on preserved tissue, so no dietary restrictions apply to the patient.
Practical Tips Before Your Test
The following points will help ensure the process goes smoothly.
- Inform your doctor about all medications you are currently taking before undergoing any biopsy procedure
- Follow all pre-biopsy or pre-surgery instructions provided by your healthcare team
- Bring a detailed clinical history, including your symptoms, previous test results, and family history, as this is required for the test
- No additional patient action is needed once the tissue sample has been collected
Step-by-Step Procedure
The steps below describe how the tissue is collected and processed for the IHC Marker-EMA test.
- A tissue sample is collected by a doctor through a needle biopsy or surgical removal of the abnormal tissue.
- The specimen is placed in formalin (a preserving fluid) and then embedded in paraffin wax to form a solid tissue block.
- In the laboratory, thin sections are cut from the paraffin block and mounted on glass slides.
- The slides undergo antigen retrieval (a process that makes the target proteins detectable) and are treated to reduce background signals.
- Specialised antibodies that bind to EMA are applied to the tissue sections.
- A qualified pathologist examines the stained slides under a microscope and records the staining pattern for interpretation.
Factors That Can Affect Accuracy
Several factors can influence the reliability of the test result.
- Inadequate tissue fixation in formalin (affects how well proteins are preserved)
- Delayed processing of the tissue after collection
- Poor quality or degraded tissue samples
- Paraffin sections that are older than six weeks may show reduced staining quality
- Expertise of the pathologist interpreting the stained slides
Understanding Your IHC Marker-EMA Test Results
Results from this test are interpreted by a pathologist alongside clinical details, imaging findings, and other IHC markers. Below is a general guide to what different staining outcomes may indicate.
| Result | Interpretation |
|---|---|
| Positive EMA staining | Suggests epithelial origin; seen in adenocarcinomas (91% of cases), meningiomas (approx. 80%), synovial sarcoma, epithelioid sarcoma, anaplastic large cell lymphoma, and perineurioma |
| Negative EMA staining | Expected in hepatocellular carcinoma, adrenal carcinoma, malignant melanoma, most malignant lymphomas, seminoma, and paraganglioma |
| Normal positive staining | Almost all glandular and ductal epithelial cells show positive EMA staining under normal conditions |
Disclaimer: These ranges are general guidelines. 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.
How to Maintain Healthy Levels
This test is used for tumour diagnosis rather than routine health screening. The following general wellness tips are still worth keeping in mind.
- Attend regular health check-ups and report any unusual lumps, growths, or persistent symptoms to your doctor promptly
- Follow your doctor's guidance carefully if any abnormal findings are detected
- Maintain a balanced diet and an active lifestyle to support overall health
Lupin Diagnostics IHC Marker-EMA Test Price
The IHC Marker-EMA test is available at Lupin Diagnostics centres starting at ₹1,920. This test requires a visit to a Lupin Diagnostics centre, as home collection is not available for tissue-based tests of this nature.
| 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
Follow these steps to book your IHC Marker-EMA test online.
- 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 or to confirm biopsy arrangements with your doctor.
- Receive your report via email or WhatsApp within the stipulated turnaround time.
Frequently Asked Questions
This test helps identify the origin of poorly differentiated tumours (cancers where cells have changed significantly from their original form). It is particularly useful for distinguishing carcinomas from lymphomas and for confirming meningiomas, synovial sarcomas, and other tumour types.
A doctor collects the tissue through a biopsy (needle or surgical). The IHC Marker-EMA test procedure is then carried out entirely in the laboratory on this preserved tissue, so no additional sample collection from the patient is needed.
No special preparation is required on the patient's part. You should follow any pre-biopsy instructions from your doctor and bring a detailed clinical history, as this is required for accurate interpretation of the results.
At Lupin Diagnostics, the report for the IHC Marker-EMA test is typically delivered within 7 days. Turnaround time may vary depending on the complexity of the full IHC panel being processed.
No. EMA is used as part of a panel of IHC markers rather than as a standalone test. A definitive diagnosis requires the pathologist to consider EMA results alongside other markers, clinical history, and imaging findings.
A positive result indicates that the tumour has epithelial characteristics. This helps narrow down the tumour type. For example, it supports a diagnosis of adenocarcinoma or meningioma. Your pathologist will explain the significance in the context of your full report.
A negative result means EMA is absent in the tissue sample. This is expected for certain tumour types such as malignant melanoma, most lymphomas, and hepatocellular carcinoma. A negative result is equally useful in guiding the diagnostic process.
IHC Marker-EMA Test
