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Chromogranin A (CGA) Test - Serum
No special precautions
Sample Type
Blood
Recommended for
Male, Female
Report
Within 24 Hours
Blood test at Home
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Chromogranin A (CGA) Test - Serum Details in Brief
| Also Known As | CgA Test, Neuroendocrine Tumour Marker Test, Serum Chromogranin A Test |
|---|---|
| Purpose | Helps diagnose and monitor neuroendocrine tumours (NETs), such as carcinoid tumours and pheochromocytoma, and assess treatment response |
| Preparation | Avoid proton pump inhibitors (PPIs) and acid-suppressing medicines for 2 weeks before the test (if possible) |
| Fasting | No fasting required |
| Reporting Time | Same day |
| Cost | 7,420 |
What is a Chromogranin A Test?
The Chromogranin A (CgA) Test is a blood test that measures the level of a protein called Chromogranin A in your bloodstream. This protein is produced by neuroendocrine cells, which are specialised cells found in hormone-producing organs such as the pancreas, adrenal glands, gastrointestinal tract, and lungs.
Doctors use this test to help detect and monitor neuroendocrine tumours (NETs) — rare types of tumours that release hormones into the blood. It also helps track the effectiveness of treatment and identify possible recurrence after therapy.
However, it’s important to note that CgA levels may also rise in certain non-cancerous conditions or due to certain medications, which is why your doctor will interpret results in the right clinical context.
What Does a Chromogranin A Test Measure?
The Chromogranin A Test measures CgA protein levels in the blood, which reflect neuroendocrine cell activity and tumour presence or progression.
- Tumour Detection: Helps identify functioning and non-functioning neuroendocrine tumours such as carcinoid tumours and pheochromocytoma.
- Treatment Monitoring: Assesses how well a patient is responding to anti-tumour or hormone-suppressing therapies.
- Recurrence Surveillance: Detects tumour relapse after surgery or medical treatment.
- Disease Progression Tracking: Helps evaluate if the tumour is growing or spreading.
- Comprehensive Tumour Marker Assessment: Used alongside other tumour markers such as NSE and 5-HIAA for complete evaluation.
Chromogranin A Test: Who Needs It and Why It’s Done
What Symptoms May Call for a Chromogranin A Test?
You may be advised to take this test if you experience symptoms that suggest a neuroendocrine tumour, such as:
- Frequent flushing or redness of the skin
- Unexplained diarrhoea or abdominal pain
- Heart palpitations or sudden changes in blood pressure
- Unexplained weight loss or fatigue
- Sweating, headache, or anxiety episodes (suggestive of pheochromocytoma)
Who Should Get a Chromogranin A Test?
This test is recommended for:
- People suspected of having neuroendocrine tumours such as carcinoid, pheochromocytoma, or pancreatic NETs.
- Patients undergoing treatment or monitoring for known NETs.
- Individuals being evaluated for tumour recurrence after surgery or therapy.
- Patients with elevated tumour markers or unexplained hormone-like symptoms.
Why is a Chromogranin A Test Done?
The Chromogranin A Test is done to detect, monitor, and assess neuroendocrine tumours, providing vital information for diagnosis, treatment planning, and ongoing care. It also helps differentiate between hormone-secreting and non-secreting tumours.
Importance of a Chromogranin A Test
The Chromogranin A Test plays an essential role in the diagnosis and management of neuroendocrine tumours (NETs).
- Provides an early indication of NET activity even before imaging detects a tumour.
- Monitors treatment response to therapies like somatostatin analogues or surgery.
- Detects tumour recurrence during follow-up.
- Helps differentiate between neuroendocrine and non-neuroendocrine tumours.
- Offers a non-invasive way to track disease progression over time.
Chromogranin A Test Booking & Reports – Metropolis Healthcare
How to Book the Chromogranin A Test and Get Your Reports
- Simple Online Booking
You can book the Chromogranin A Test through the Metropolis Healthcare website or app. Choose your preferred time slot for home sample collection, or visit the nearest Metropolis Lab. - Safe Home Sample Collection
Our trained phlebotomists collect your sample at home under strict safety and hygiene protocols for your convenience. - Sample Tracking Updates
Stay updated on every step of the process through Metropolis Healthcare’s online tracking system. - Accurate Laboratory Testing
Your sample is processed using Chemiluminescence Immunoassay (CLIA) at our NABL & CAP accredited laboratories, ensuring precision and reliability. - Quick & Easy Reports
Receive your test reports via email, WhatsApp, or directly download them from the Metropolis website or app.
Is Home Sample Collection for Chromogranin A Test Available Near You?
Yes. Metropolis Healthcare offers home sample collection for the Chromogranin A Test across multiple locations. Our experienced team ensures safe and timely collection, eliminating the need for lab visits while ensuring high-quality testing and accurate results.
How Long Does It Take to Get a Chromogranin A Test Report?
Reports are usually available on the same day by 9:00 PM once the sample reaches the laboratory.
Note: Reporting time may vary based on your location.
Where Can I See or Get Chromogranin A Test Results?
You can access your reports through multiple channels – log in to the Metropolis Healthcare website or app, receive reports via email or WhatsApp, or collect a physical copy from the nearest Metropolis Lab.
Interpreting Chromogranin A Test Results
What Your Chromogranin A Test Results May Indicate
| Parameter | Normal Range | Interpretation |
|---|---|---|
| Chromogranin A | <100 ng/mL | Normal – No active neuroendocrine tumour detected |
| Chromogranin A | >100 ng/mL | Elevated – Possible neuroendocrine tumour (NET), or secondary cause such as medication or other disease |
Understanding Abnormal Chromogranin A Test Results by Parameter
| Parameter | High Values May Indicate | Possible Non-Tumour Causes |
|---|---|---|
| Chromogranin A | Neuroendocrine tumours (carcinoid, pheochromocytoma, pancreatic NETs) | Proton pump inhibitor (PPI) use, chronic kidney disease, inflammatory bowel disease, autoimmune conditions, myocardial infarction |
How Should You Prepare for a Chromogranin A Test?
Proper preparation helps ensure accurate results:
- Avoid PPIs: Stop proton pump inhibitors (e.g., omeprazole, pantoprazole) for at least 2 weeks before the test, if possible.
- Consult your doctor: Before stopping any medication, discuss alternatives such as H2 blockers.
- No fasting required: Eat and drink normally unless your doctor requests otherwise.
- Inform your doctor: Share your complete medical history, including medications and existing conditions.
- Stay calm and hydrated: Drink enough water before your test to make blood collection easier.
How Is a Chromogranin A Test Done? (Step-by-Step Procedure)
- Preparation: A tourniquet is applied around your upper arm to locate a vein.
- Cleaning: The puncture site is disinfected with an antiseptic solution.
- Blood Draw: A sterile needle is used to draw about 3 ml of blood into a plain vacutainer (without gel).
- Completion: The needle is removed, and a bandage is applied.
- Processing: The blood sample is analysed using a Chemiluminescence Immunoassay (CLIA) technique for high accuracy.
Conditions That May Affect Chromogranin A Test Accuracy
Several factors can influence your test results:
- PPI or acid-suppressant medication use can raise CgA levels falsely.
- Kidney dysfunction or chronic renal insufficiency can increase levels.
- Inflammatory conditions like inflammatory bowel disease or autoimmune disorders.
- Heart disease such as myocardial infarction or heart failure.
- Recent stress or illness may also impact results.
Diseases That a Chromogranin A Test Can Help Detect
This test helps identify and monitor the following conditions:
- Neuroendocrine Tumours (NETs) including carcinoid, pancreatic, and adrenal tumours.
- Pheochromocytoma – a rare adrenal gland tumour causing high blood pressure.
- Carcinoid Syndrome – hormone-secreting NETs causing flushing and diarrhoea.
- Medullary Thyroid Carcinoma – thyroid tumour with neuroendocrine features.
- Gastroenteropancreatic Tumours (GEP-NETs) – tumours in the GI tract and pancreas.
Chromogranin A Test Price in Different Cities
The cost of a Chromogranin A Test may vary depending on your location. Here's a table showing the approximate price range for the Chromogranin A Test at Metropolis Healthcare in major Indian cities:
|
City |
Approximate Cost (INR) |
|
₹ 7000 to ₹ 7500 |
|
|
₹ 7000 to ₹ 7500 |
|
|
₹ 7000 to ₹ 7500 |
|
|
₹ 7000 to ₹ 7500 |
The Chromogranin A Test cost may vary depending on the city and the specific tests included in the panel. However, Metropolis Healthcare offers competitive Chromogranin A Test prices across major cities in India.
References
- Oberg, K., Modlin, I.M., De Herder, W., et al. (2010). Chromogranin A as a biomarker for neuroendocrine tumours: an overview. Endocrine-Related Cancer, 17(1), 49–59. PMID: 19995821
- Gut, P., Czarnywojtek, A., Fischbach, J., et al. (2016). Chromogranin A – unspecific neuroendocrine marker: clinical utility and diagnostic pitfalls. Archives of Medical Science, 12(1), 1–9. PMID: 26925113
- Stridsberg, M., Eriksson, B., Oberg, K., et al. (2003). A comparison between different assays for Chromogranin A and their clinical significance. Journal of Endocrinology, 177(2), 337–343. PMID: 12730272
- Giovanella, L., La Rosa, S., Ceriani, L., et al. (2011). Chromogranin A measurement in neuroendocrine tumours: clinical and biological aspects. Clinical Biochemistry, 44(13), 1181–1188. PMID: 21798223
- De Herder, W.W., et al. (2014). Diagnostic and therapeutic utility of biochemical markers in neuroendocrine tumours. European Journal of Endocrinology, 170(1), 1–17. PMID: 24001615
Chromogranin A (CGA) Test - Serum Price
Metropolis Healthcare is a leading diagnostics centre and pathology lab in India equipped with the latest state-of-the-art technologies that provides the Chromogranin A (CGA) Test - Serum with a clear pricing structure.
The Chromogranin A (CGA) Test - Serum Price in Bangalore is ₹ 7,420 .
We are committed to deliver accurate and quality results from the best labs in India with complete transparency regarding test cost and turnaround time. No matter where you are, we strive to offer patients high-quality service that is affordable and accessible.
Frequently Asked Questions
High levels may indicate a neuroendocrine tumour or can occur due to medications like PPIs or non-cancerous diseases.
Fasting is not mandatory, but avoid heavy meals or caffeine before the test.
Yes. Proton pump inhibitors (PPIs) and acid-reducing medicines can cause false elevations. Discuss alternatives with your doctor before the test.
It can detect most NETs but is not specific for tumour location; imaging tests may be needed for confirmation.
Reports are generally available on the same day by 9:00 PM once the sample reaches the lab.
They are rare tumours that develop from hormone-producing nerve cells found in the pancreas, GI tract, and adrenal glands.
Avoid PPIs for at least 2 weeks before the test if possible. Always consult your doctor before stopping any medication.
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We offer a comprehensive range of 4000+ clinical laboratory tests and profiles, which are used for prediction, early detection, diagnostic screening, confirmation and/or monitoring of the disease.
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