IHC Marker - Arginase1 Test
About IHC Marker - Arginase1 Test
| Field | Value |
|---|---|
| Also Known As | Arginase-1 IHC, Arg-1 Immunostain, ARG1 Marker, Liver Arginase IHC |
| Sample Type | Tissue biopsy (formalin-fixed, paraffin-embedded block) |
| Fasting Required | No fasting required for the IHC test itself; fasting may be needed if the biopsy involves sedation or anaesthesia |
| Report Time | 3 Days |
| Recommended For | Adults with suspected liver tumours; males and females |
| Price | Starting at ₹1,920 |
What is an IHC Marker - Arginase1 Test?
The IHC marker - Arginase1 test is a specialised pathology test that detects the presence of the Arginase-1 protein in a tissue sample using a technique called immunohistochemistry (IHC).
IHC uses targeted antibodies to identify specific proteins within tissue, helping pathologists determine the origin and nature of a tumour.
This test is typically ordered after a liver biopsy when a doctor needs to distinguish primary liver cancer from other tumours affecting the liver. It is also known as the Arginase-1 IHC or Arg-1 Immunostain.
What Does an IHC Marker - Arginase1 Test Measure?
This test detects the Arginase-1 protein in tissue sections taken from the liver or a liver tumour. Arginase-1 is an enzyme found predominantly in liver cells (hepatocytes). Its presence or absence in a tissue sample provides important diagnostic information. The table below summarises what the test evaluates:
| Component | What it Shows |
|---|---|
| Arginase-1 protein expression | Whether the tissue contains liver cell origin (hepatocytic) characteristics |
| Staining pattern (cytoplasmic or nuclear) | Confirms hepatocellular origin when positive |
| Staining intensity and distribution | Helps assess tumour differentiation and aids the pathologist's interpretation |
Why is an IHC Marker - Arginase1 Test Done?
Doctors order the Arginase-1 IHC test when a liver biopsy reveals abnormal tissue and a definitive diagnosis is needed. The test helps identify whether a tumour in the liver originated there or spread from another part of the body.
Common Symptoms That May Require This Test
Patients are typically referred for a liver biopsy and subsequent IHC marker - Arginase1 test procedure when they present with symptoms such as:
- Persistent pain or discomfort in the upper right part of the abdomen
- Unexplained weight loss
- A palpable lump or mass in the upper right abdomen
- Yellowing of the skin or eyes (jaundice)
- Persistent fatigue with no clear cause
- Loss of appetite lasting several weeks
Conditions This Test Can Help Detect
A pathologist uses this test to help differentiate between several liver-related conditions. These include:
- Hepatocellular carcinoma (HCC), which is the primary liver cancer
- Metastatic carcinoma in the liver, meaning cancer that has spread from another organ
- Cholangiocarcinoma, a cancer arising from the bile ducts inside the liver
- Benign hepatocellular lesions such as hepatic adenoma, focal nodular hyperplasia, and dysplastic nodules
How to Prepare and What to Expect
Since this test is performed on tissue collected through a biopsy, most of the preparation relates to the biopsy procedure itself rather than the IHC laboratory analysis.
Do You Need to Fast?
No fasting is required for the IHC test itself. However, if your biopsy procedure involves sedation or general anaesthesia, your doctor will ask you to fast beforehand. Always follow the specific fasting instructions given by your treating physician.
Practical Tips Before Your Test
Preparing properly for your biopsy appointment will help ensure a smooth experience. Keep the following in mind:
- Bring a detailed clinical history, including your symptoms, previous test results, and family history, as this is required for the test
- Inform your doctor about any blood-thinning medications, as these may increase bleeding risk during the biopsy
- Follow all pre-biopsy instructions provided by your doctor regarding medications and diet
- Arrange for someone to accompany you to the appointment if sedation is planned
- Stay well hydrated in the days before your biopsy unless instructed otherwise
Step-by-Step Procedure
The IHC marker - Arginase1 test procedure involves two stages: tissue collection through a biopsy, and laboratory analysis. Here is what happens:
- A doctor performs a liver biopsy to collect a small piece of tissue. Local anaesthesia is usually given to minimise discomfort during the procedure.
- The collected tissue is preserved in a chemical fixative and embedded in paraffin wax to maintain its structure. This creates a formalin-fixed, paraffin-embedded (FFPE) tissue block.
- In the laboratory, very thin sections are cut from the tissue block and placed onto microscope slides.
- Antibodies specifically designed to detect the Arginase-1 protein are applied to the tissue sections. These antibodies bind to the protein if it is present.
- A detection system is applied that produces a visible colour change (typically a brown stain) wherever the antibody has bound, indicating the presence and location of the protein.
- A qualified pathologist examines the stained slide under a microscope and records the result as positive or negative, along with details of the staining pattern.
Factors That Can Affect Accuracy
Several factors can influence the reliability of Arginase-1 IHC results. These include:
- Poor tissue preservation or insufficient sample volume, which may lead to inconclusive findings
- Inadequate fixation time before processing the tissue block
- Suboptimal antigen retrieval technique used in the laboratory
- Antibody quality and specificity
- The degree of tumour differentiation (poorly differentiated tumours may show reduced or absent staining)
Understanding Your IHC Marker - Arginase1 Test Results
Results from this test are reported by a pathologist and must be reviewed alongside clinical history, imaging findings, and other IHC markers. The table below outlines how results are generally interpreted:
| Result | Interpretation |
|---|---|
| Positive (cytoplasmic staining, with or without nuclear staining) | Supports hepatocellular origin; consistent with HCC or a benign liver cell lesion |
| Negative (no staining) | Suggests non-hepatocellular origin; the tumour may be metastatic carcinoma or cholangiocarcinoma |
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.
Results During Special Conditions
Poorly differentiated hepatocellular carcinomas may show reduced or absent Arginase-1 expression, which can affect the interpretation.
Well-differentiated HCC almost always shows positive staining.
Technical factors such as tissue fixation quality and antigen retrieval methods can also alter staining intensity, and results should always be considered alongside the full clinical picture.
How to Maintain Healthy Levels
While this test is diagnostic rather than one used for routine monitoring, maintaining liver health is always worthwhile. Consider the following general wellness tips:
- Limit alcohol consumption to reduce the burden on the liver
- Get vaccinated against Hepatitis B, a known risk factor for liver cancer
- If you have chronic liver disease or cirrhosis, follow your doctor's advice regarding regular surveillance
Lupin Diagnostics IHC Marker - Arginase1 Test Price
The IHC marker - Arginase1 test cost at Lupin Diagnostics starts at ₹1,920. This test requires a visit to a Lupin Diagnostics centre, as it is performed on tissue collected through a biopsy procedure. Home collection is not available for this test.
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 1920 |
| CHENNAI | 1920 |
| HYDERABAD | 1920 |
| KOLKATA | 1920 |
| NAVI MUMBAI | 1920 |
| PUNE | 1920 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Follow these steps for the IHC marker - Arginase1 test online booking with Lupin Diagnostics.
- Select the test on the Lupin Diagnostics website.
- Choose your city and preferred centre location.
- Visit the centre at your scheduled time for sample collection.
- Receive your report via email or WhatsApp within the stipulated turnaround time.
Frequently Asked Questions
The IHC marker - Arginase1 test detects the Arginase-1 protein in liver tissue to help identify the origin of a tumour. It is primarily used to distinguish primary liver cancer (hepatocellular carcinoma) from cancers that have spread to the liver from other organs, as well as from bile duct cancers.
The tissue sample is obtained through a biopsy performed by a doctor. Depending on the clinical situation, this may be a fine-needle aspiration, core needle biopsy, or surgical biopsy. Local anaesthesia is typically administered to reduce discomfort during the procedure.
No fasting is required for the IHC laboratory analysis itself. However, if the biopsy procedure involves sedation or general anaesthesia, your doctor will provide specific fasting instructions that you should follow carefully.
At Lupin Diagnostics, the report is delivered within 3 days. Overall turnaround may vary if this test is part of a larger panel of IHC markers, as the pathologist reviews all results together before issuing a final report.
Arginase-1 has a reported sensitivity of 96% and specificity of 96% for detecting hepatocellular carcinoma, making it more accurate than older markers such as HepPar-1. Its ability to detect even moderately and poorly differentiated tumours makes it a valuable tool in liver tumour diagnosis.
A negative result suggests the tumour may not be of liver cell origin. However, no single marker offers 100% certainty. Your pathologist may recommend additional IHC markers, such as Glypican-3 or HepPar-1, to form a more complete diagnostic picture alongside the Arginase-1 IHC result.
No. This test requires a tissue sample collected through a biopsy, which must be performed in a hospital or clinical setting. The tissue block is then processed and analysed in a specialised pathology laboratory. IHC marker - Arginase1 test home collection is not available.
IHC Marker - Arginase1 Test
