Biopsy Nerve with Special Stains Test
Short Name: Nerve Biopsy with Special Stains
Also known as: Nerve Biopsy, Peripheral Nerve Biopsy, Sural Nerve Biopsy
Biopsy Nerve with Special Stains Test test available at DNA Labs India for ₹4,500. Uses Histopathology, Special Stains (e.g., Toluidine Blue, Congo Red, Immunohistochemistry) on Tissue (nerve biopsy) samples. Results in Results are typically available within 10 days after the laboratory receives the sample.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Pasupathy Arumugam
Consultant Pathologist · Reg: 21521
Last reviewed: September 7, 2026
Overview
The purpose of a nerve biopsy with special stains is to evaluate the structural and pathological changes in peripheral nerve tissue. It aids in diagnosing conditions such as peripheral neuropathy (axonal or demyelinating), vasculitis, amyloidosis, leprosy, and inherited neuropathies. The special stains help differentiate between various types of nerve fiber damage and identify specific deposits or inflammatory infiltrates, guiding clinical management.
- Test Code
- 6067
- CPT Code
- 88305
- ICD Code
- G60-G65
- Price
- ₹4,500
- Sample Type
- Tissue (nerve biopsy)
- Result Time
- Results are typically available within 10 days after the laboratory receives the sample.
- Fasting Required
- No
- Method
- Histopathology, Special Stains (e.g., Toluidine Blue, Congo Red, Immunohistochemistry)
Sample Collection
Inform your doctor about any medications, allergies, or bleeding disorders. You may be advised to stop certain blood-thinning medications before the procedure. No fasting is required.
Method: Surgical biopsy or needle biopsy
Laboratory Analysis
The procedure is performed under local anesthesia. A small incision is made to remove a tiny segment of nerve tissue (usually from the calf or ankle). The sample is immediately placed in 2% glutaraldehyde (CIDEX) solution for preservation.
Report Delivery
You may experience mild discomfort, numbness, or tingling at the biopsy site. Keep the area clean and dry. Avoid strenuous activities for a few days. Follow your doctor's instructions for wound care and report any signs of infection (redness, swelling, fever).
Timeline: Results are typically available within 10 days after the laboratory receives the sample.
Patient Instructions
About This Test
Who Should Get This Test
The purpose of a nerve biopsy with special stains is to evaluate the structural and pathological changes in peripheral nerve tissue. It aids in diagnosing conditions such as peripheral neuropathy (axonal or demyelinating), vasculitis, amyloidosis, leprosy, and inherited neuropathies. The special stains help differentiate between various types of nerve fiber damage and identify specific deposits or inflammatory infiltrates, guiding clinical management.
How to Prepare
- Biopsy must be performed by a qualified surgeon or neurologist
- Sample must be placed in 2% Glutaraldehyde (CIDEX) immediately
- Label the container with patient details and date
- Transport to the laboratory at room temperature (do not freeze)
- Ensure the sample reaches the lab within 24 hours
Doctor's Notes
Reviewed by Dr Pasupathy Arumugam — MBBS, MD (Pathology) · Reg. No. 21521
"Nerve biopsy with special stains is a valuable diagnostic tool for evaluating peripheral neuropathies when clinical and electrophysiological findings are inconclusive. It helps differentiate between demyelinating, axonal, and inflammatory neuropathies, guiding targeted therapy."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Sample not in appropriate fixative (e.g., formalin instead of glutaraldehyde)
- Inadequate tissue size
- Sample dried out or contaminated
- Incorrect labeling or missing requisition form
Understanding Your Results
Suggests axonal neuropathy, possibly due to metabolic, toxic, or hereditary causes.
Indicates demyelinating neuropathy, such as CIDP or hereditary demyelinating neuropathies.
Suggests vasculitic neuropathy, requiring systemic evaluation for autoimmune conditions.
Confirms amyloidosis, which may be systemic or localized.
Seen in small fiber neuropathies, often associated with diabetes or other metabolic disorders.
Consult your doctor if you experience persistent numbness, tingling, weakness, or pain in your extremities, or if you have been advised to undergo a nerve biopsy. Early diagnosis can help manage underlying conditions effectively.
Limitations
- ⚠Focal nerve lesions may be missed due to sampling error
- ⚠Invasive procedure with risk of nerve damage, infection, or bleeding
- ⚠Interpretation requires expertise and may be subjective
- ⚠Not a first-line diagnostic test; usually reserved for cases where non-invasive tests are inconclusive
Risks & Considerations
- ●Infection at the biopsy site
- ●Bleeding or hematoma
- ●Nerve damage leading to persistent numbness or weakness
- ●Allergic reaction to local anesthetic
- ●Scarring
Interfering Factors
- ●Prior nerve injury or surgery at biopsy site
- ●Inadequate tissue sample
- ●Improper fixation or handling of specimen
- ●Recent trauma to the nerve
- ●Certain medications (e.g., neurotoxic drugs) may affect nerve morphology
Compare With Similar Tests
| Test | Biopsy Nerve with Special Stains | Nerve Conduction Study (NCS) | Electromyography (EMG) | Skin Biopsy for Intraepidermal Nerve Fiber Density | Genetic Testing for Neuropathy |
|---|---|---|---|---|---|
| Comparison | Biopsy Nerve with Special Stains | NCS evaluates the electrical function of nerves and is non-invasive. It helps localize the site of nerve damage but does not provide histological details. Nerve biopsy provides tissue diagnosis and is more invasive. | EMG assesses muscle response to nerve stimulation and can indicate nerve damage. It is complementary to nerve biopsy but does not reveal the underlying pathology at the tissue level. | Skin biopsy is less invasive and assesses small nerve fibers in the skin. It is useful for small fiber neuropathy but does not provide information on larger nerve trunks or specific pathologies like vasculitis. | Genetic testing identifies hereditary neuropathies but does not assess structural changes. Nerve biopsy can confirm the pathological phenotype and guide genetic testing. |
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