Biopsy Renal Transplant with C4D (Without IF) Test
Short Name: Renal Transplant C4D Biopsy
Also known as: Renal Biopsy with C4d, Kidney Transplant Biopsy C4d, C4d Immunostain Renal Biopsy
Biopsy Renal Transplant with C4D (Without IF) Test test available at DNA Labs India for ₹6,750. Uses Histopathology, Immunohistochemistry (C4d) on Tissue (Renal Biopsy) samples. Results in Reports are typically available within 5 days after the sample reaches the laboratory. Urgent cases may be expedited upon request.. 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 primary purpose of this test is to diagnose or rule out antibody-mediated rejection in renal transplant recipients. It also helps differentiate between acute cellular rejection and antibody-mediated rejection, which require different treatment approaches. Additionally, it can identify other causes of graft dysfunction, such as calcineurin inhibitor toxicity, chronic allograft nephropathy, or recurrent glomerular disease. The C4d stain specifically highlights complement activation, providing a reliable marker for AMR. This information is crucial for tailoring immunosuppressive therapy and monitoring the response to treatment.
- Test Code
- 6068
- CPT Code
- 88305
- ICD Code
- T86.11
- Price
- ₹6,750
- Sample Type
- Tissue (Renal Biopsy)
- Result Time
- Reports are typically available within 5 days after the sample reaches the laboratory. Urgent cases may be expedited upon request.
- Fasting Required
- No
- Method
- Histopathology, Immunohistochemistry (C4d)
Sample Collection
A doctor's prescription is required. Inform your physician about all medications, especially immunosuppressants and anticoagulants. You may be advised to hold anticoagulants before the biopsy. Fasting is not required. The biopsy is performed by a clinician, usually under ultrasound guidance.
Method: Ultrasound-guided percutaneous biopsy by clinician
Laboratory Analysis
The patient lies prone or on the side. The skin is cleaned and numbed with local anesthesia. A thin needle is inserted into the kidney to obtain a small tissue core. The procedure takes about 15-30 minutes. You may feel pressure but should not experience severe pain.
Report Delivery
After the biopsy, you will be monitored for a few hours for bleeding or complications. You may be advised to rest and avoid strenuous activities for 24-48 hours. Drink plenty of fluids to help flush out any blood. Contact your doctor if you experience severe pain, fever, or blood in urine.
Timeline: Reports are typically available within 5 days after the sample reaches the laboratory. Urgent cases may be expedited upon request.
Patient Instructions
About This Test
Who Should Get This Test
The primary purpose of this test is to diagnose or rule out antibody-mediated rejection in renal transplant recipients. It also helps differentiate between acute cellular rejection and antibody-mediated rejection, which require different treatment approaches. Additionally, it can identify other causes of graft dysfunction, such as calcineurin inhibitor toxicity, chronic allograft nephropathy, or recurrent glomerular disease. The C4d stain specifically highlights complement activation, providing a reliable marker for AMR. This information is crucial for tailoring immunosuppressive therapy and monitoring the response to treatment.
How to Prepare
- Tissue must be placed immediately in 10% neutral buffered formalin for histopathology
- If IF is also required, a separate sample in Michel's medium is needed (not for this test)
- Label the container with patient name, date, and site
- Transport at room temperature to the laboratory as soon as possible
Doctor's Notes
Reviewed by Dr Pasupathy Arumugam — MBBS, MD (Pathology) · Reg. No. 21521
"C4d staining is essential for diagnosing antibody-mediated rejection in renal transplant recipients. Early detection through biopsy helps guide immunosuppressive therapy and improve graft survival."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Unlabeled or mislabeled specimen
- Inadequate tissue (less than 1 cm or no glomeruli)
- Sample in wrong fixative (e.g., saline instead of formalin)
- Sample frozen or hemolyzed
Understanding Your Results
No evidence of acute rejection. Graft may be stable.
Antibody-mediated rejection (AMR) likely. Requires immediate treatment.
Acute T-cell mediated rejection (TCMR). Treat with steroids or anti-thymocyte globulin.
May indicate 'C4d deposition without evidence of rejection' - clinical correlation needed.
Chronic allograft injury, possibly due to chronic AMR or other causes.
Consult your transplant nephrologist immediately if you experience symptoms such as decreased urine output, swelling, fever, or pain at the biopsy site. Also, if your serum creatinine rises or if you have any concerns about your graft function, seek medical advice promptly.
Limitations
- ⚠C4d staining may be negative in some cases of antibody-mediated rejection (C4d-negative AMR)
- ⚠Sampling error may miss focal lesions
- ⚠Interpretation requires expertise in renal pathology
- ⚠Without IF, certain immune complex diseases may not be fully characterized
- ⚠Results should be correlated with clinical and serological findings
Risks & Considerations
- ●Bleeding at the biopsy site (hematuria or perinephric hematoma)
- ●Infection
- ●Arteriovenous fistula formation
- ●Puncture of adjacent organs (rare)
- ●Pain or discomfort
Interfering Factors
- ●Inadequate tissue sample (less than 7 glomeruli and 1 artery)
- ●Crush artifact or tissue fragmentation
- ●Delayed fixation leading to autolysis
- ●Prior treatment with high-dose steroids may mask rejection
- ●Recent administration of anti-thymocyte globulin can alter inflammatory infiltrate
Compare With Similar Tests
| Test | Biopsy Renal Transplant with C4D (Without IF) | Renal Transplant Biopsy with IF | Serum Creatinine and eGFR | Donor-Specific Antibody (DSA) Test | Urine Protein-to-Creatinine Ratio |
|---|---|---|---|---|---|
| Comparison | Biopsy Renal Transplant with C4D (Without IF) | This test includes immunofluorescence for immune complex deposition, which is useful for diagnosing glomerulonephritis. The C4d test without IF focuses on antibody-mediated rejection and is more cost-effective when IF is not needed. | These are blood tests that assess kidney function but cannot differentiate the cause of dysfunction. A biopsy provides tissue diagnosis. | DSA testing detects circulating antibodies against the donor. A positive DSA supports AMR, but biopsy with C4d confirms the diagnosis. | This urine test indicates proteinuria but does not identify the underlying pathology. Biopsy is definitive. |
Frequently Asked Questions
What is the cost of Biopsy Renal Transplant with C4D (Without IF) at DNA Labs India?
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