Immunoglobulin IgG CSF Test: Booking, Price, and Results
About Immunoglobulin IgG CSF Test: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | CSF IgG, cerebrospinal fluid IgG level, IgG spinal fluid, CSF immunoglobulin G |
| Sample Type | Cerebrospinal fluid (CSF) collected via lumbar puncture |
| Fasting Required | No fasting required |
| Report Time | 3 days |
| Recommended For | All genders and ages, primarily adults with suspected neurological disorders |
| Price | Starting at ₹2,000 |
What Is an Immunoglobulin IgG CSF Test?
The immunoglobulin IgG CSF test measures the level of IgG antibodies in cerebrospinal fluid - the clear fluid that surrounds the brain and spinal cord. IgG is a type of protein that the immune system produces to fight infections and other threats. It is also known as the CSF IgG test or cerebrospinal fluid IgG level. Doctors order this test to find out whether the immune system is generating antibodies inside the central nervous system, which can point to certain neurological conditions.
What Does an Immunoglobulin IgG CSF Test Measure?
This test analyses the concentration of IgG antibodies in the cerebrospinal fluid and may also calculate an IgG index. Here is what each component tells us:
| Component | What It Measures |
|---|---|
| CSF IgG level | The amount of IgG antibody present in the spinal fluid. |
| CSF IgG index | A ratio comparing CSF IgG and albumin against blood IgG and albumin; an elevated index suggests the central nervous system is producing extra IgG. |
A raised IgG Index indicates that antibody production is happening within the brain or spinal cord itself, rather than simply crossing from the bloodstream.
Why Is an Immunoglobulin IgG CSF Test Done?
This test is ordered when a doctor suspects a condition affecting the central nervous system. Below are the common reasons it may be prescribed.
Common Symptoms That May Require This Test
The following symptoms often prompt a doctor to request this test:
- Unexplained vision problems or blurred vision
- Numbness or tingling in the arms or legs
- Muscle weakness or loss of coordination
- Balance difficulties or unsteady walking
- Persistent, unusual fatigue
- Cognitive changes such as memory or concentration difficulties
Conditions This Test Can Help Detect
This test can assist in identifying a range of neurological conditions, including:
- Multiple sclerosis (MS), an autoimmune condition that damages the protective covering of nerve fibres
- Neurosyphilis, where a syphilis infection affects the nervous system
- Subacute sclerosing panencephalitis, a rare progressive brain disorder
- Transverse myelitis, an inflammation of the spinal cord
- Guillain-Barré syndrome, where the immune system attacks the body's nerves
- Encephalitis caused by herpes simplex virus
- Tuberculous meningitis, lyme neuroborreliosis, and HIV-related nerve disorders
How to Prepare and What to Expect
Because CSF is collected through a lumbar puncture, there are a few important steps to follow before and during the procedure.
Do You Need to Fast?
No fasting is required for this test. You may be asked to empty your bladder and bowels before the procedure for comfort.
Practical Tips Before Your Test
The following steps will help your test go smoothly:
- Tell your doctor about all medications you currently take, especially blood-thinning drugs, as these can affect the procedure.
- Inform your doctor of any bleeding disorders before the test.
- Wear loose, comfortable clothing on the day of the test.
- Try to arrange for someone to accompany you, as you may need to rest for a while after the procedure.
- If a blood sample is also being collected alongside the CSF, both should ideally be taken on the same day for accurate result interpretation.
Step-by-Step Procedure
The CSF sample is collected in a clinical setting by a trained healthcare professional. Here is what to expect:
- You will lie on your side or sit on an examination table. The doctor will clean your lower back and inject a local anaesthetic to numb the area.
- Once the area is numb, a thin hollow needle is carefully inserted between two vertebrae in your lower spine to reach the cerebrospinal fluid.
- A small amount of CSF is withdrawn. The process takes around five minutes. You will need to stay still during this time.
- After collection, the needle is removed, and gentle pressure is applied to the site with sterile gauze.
- You may be asked to lie flat on your back for one to two hours after the procedure to reduce the chance of a post-procedure headache.
- The collected sample is sealed in a sterile container and sent to the laboratory under refrigerated conditions for analysis using the EIA (enzyme immunoassay) method.
Factors That Can Affect Accuracy
Several factors can influence the reliability of results:
- Blood contamination of the CSF sample during collection
- Active infections at the time of testing
- Certain medications, particularly immunosuppressants
- A gap in timing between CSF and blood sample collection
- Age and individual biological differences, which can influence albumin levels in the fluid
Understanding Your IgG CSF Test Results
Your doctor will review your results alongside your symptoms, medical history, and other tests. The table below shows general reference ranges for CSF IgG levels.
| Parameter | Normal Range | Unit |
|---|---|---|
| CSF IgG (ages 15 to 20 years) | 3.5 ± 2.0 | mg/dL |
| CSF IgG (ages 21 to 40 years) | 4.2 ± 1.4 | mg/dL |
| CSF IgG (ages 41 to 60 years) | 4.7 ± 1.0 | mg/dL |
| CSF IgG (ages 61 to 87 years) | 5.8 ± 1.6 | mg/dL |
| CSF IgG index | 0.25 to 0.70 | Ratio |
An IgG index above 0.70 suggests active IgG production within the central nervous system. A level below the normal range may indicate the body is unable to produce sufficient IgG antibodies.
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
Certain conditions can influence how results are interpreted:
- If the blood-brain barrier (the protective boundary between blood and brain tissue) is damaged, IgG from the bloodstream can enter the CSF and raise levels, even without active CNS infection or inflammation.
- In conditions such as stroke or tumours, a raised IgG index may reflect barrier disruption rather than local antibody production.
- Age, ethnicity, and other environmental factors can affect albumin levels in the CSF, which in turn influences how the IgG index is calculated.
How to Maintain Healthy Levels
These are general wellness tips to support neurological health:
- Follow your neurologist's guidance and attend all scheduled follow-up appointments.
- Report any new or worsening neurological symptoms to your doctor promptly.
- Maintain a balanced diet, regular physical activity, and adequate sleep to support overall immune health.
Lupin Diagnostics Immunoglobulin IgG CSF Test Price
The immunoglobulin IgG CSF test is priced starting at ₹2,000 at Lupin Diagnostics. This test requires a visit to a Lupin Diagnostics centre, as CSF collection must be performed by a trained healthcare professional in a clinical setting. Home collection is not available for this test.
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 2000 |
| CHENNAI | 2000 |
| HYDERABAD | 2000 |
| KOLKATA | 2000 |
| NAVI MUMBAI | 2000 |
| PUNE | 2000 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
- 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 IgG CSF test measures the level of IgG antibodies in the fluid surrounding the brain and spinal cord. It helps doctors detect whether the immune system is producing antibodies within the central nervous system, which can indicate conditions such as multiple sclerosis and other neurological disorders.
No, fasting is not required. However, you may be asked to empty your bladder before the procedure, and you should inform your doctor about any medications or bleeding conditions beforehand.
The sample is collected through a lumbar puncture, also called a spinal tap. A doctor inserts a thin needle into the lower spine to withdraw a small amount of cerebrospinal fluid. Local anaesthesia is used to numb the area, so the procedure is generally well tolerated.
No, this test alone cannot diagnose multiple sclerosis. A raised CSF IgG level or elevated IgG index supports the possibility of MS, but doctors typically use additional tests — including MRI scans and other CSF analyses — before making a diagnosis.
An IgG Index above 0.70 suggests that the central nervous system is actively producing IgG antibodies. This can occur in conditions such as multiple sclerosis, CNS infections, or other inflammatory disorders of the brain and spinal cord.
Reports for the immunoglobulin IgG CSF test at Lupin Diagnostics are typically delivered within 3 days of sample collection.
A lumbar puncture is a safe procedure when performed by an experienced professional. Some people experience a mild headache afterwards. Rare complications include localised soreness, minor bleeding, or infection. Your doctor will discuss these with you before the procedure.
Immunoglobulin IgG CSF Test: Booking, Price, and Results
