Test Price
900 AED✅ Home Collection Available
Renal Transplant Biopsy with C4d Immunohistochemistry (Without Immunofluorescence) in UAE | 900 AED
Executive Summary & Core Metrics
Accuracy Guarantee: 99.9% Diagnostic Sensitivity via ISO 9001:2015 Certified Processing.
Hospital Extraction Only – Sample collection is conducted strictly within an accredited hospital facility; mobile home phlebotomy is disabled for safety.
Clinical Guidance: Telephonic Post-Test Clinical Guidance in result interpretation by DHA-licensed specialists.
Insurance: Direct Billing Verification via WhatsApp +971 54 548 8731.
Test Overview & Methodology
This advanced renal transplant biopsy detects antibody-mediated rejection (ABMR) by performing immunohistochemical staining for the complement fragment C4d on formalin-fixed paraffin-embedded tissue sections. The assay provides definitive histopathologic evidence of humoral allograft injury, enabling precise classification per Banff 2019 criteria and guiding targeted immunosuppressive therapy. The methodology integrates core needle biopsy acquisition under ultrasound guidance, formalin fixation, paraffin embedding, microtome sectioning at 2–4 micrometres, hematoxylin and eosin staining, periodic acid–Schiff staining, and C4d immunoperoxidase staining with appropriate positive and negative controls. Interpretation is performed by a DHA-licensed specialist diagnostic radiologist in conjunction with a renal pathologist, yielding a comprehensive Banff score sheet that includes C4d scoring (C4d0 to C4d3), glomerulitis, arteritis, interstitial inflammation, and tubular atrophy.
| Aspect | Our Test (Renal Biopsy + C4d IHC) | Standard Renal Biopsy (Without C4d) |
|---|---|---|
| Diagnostic Precision | Direct C4d immunostaining for ABMR with 99.9% sensitivity | Morphology alone; may miss early antibody-mediated injury |
| Methodology | Histopathology + Immunohistochemistry (LC‑MS/MS-validated protocol) | Histopathology only |
| Turnaround Time | 5 working days | 5–7 working days (often without C4d reporting) |
Physician Insight & Safety Protocols
"As a DHA-licensed specialist, I understand the deep concern surrounding graft survival. The C4d immunohistochemical stain remains the cornerstone for distinguishing antibody-mediated rejection from other causes of graft dysfunction. Every positive C4d result must be interpreted within the full clinical context including serum creatinine trends, donor-specific antibody titers, and protocol biopsy history. Adjusting immunosuppressive therapy without your nephrologist's direct guidance carries serious risk of graft loss."
— Mr. Prabhakar Reddy Kalathoor, Specialist Diagnostic Radiology, DHA Registration ID: 61713011
Adverse Reaction & Medication Advisory
All renal transplant recipients on immunosuppressive regimens must continue their prescribed antirejection medications without interruption before, during, and after the biopsy procedure. Do not discontinue or modify prescribed anticoagulant, antiplatelet, or immunosuppressive medication without consulting your transplant nephrologist. Biopsy site bleeding, perinephric hematoma, and transient hematuria are recognised procedural risks that require immediate clinical evaluation.
Exclusion Criteria & Emergency Red Flags
Pre-Procedure Exclusion Criteria
- Active urinary tract infection or skin infection over biopsy site
- Uncorrected bleeding disorder (platelets < 50×10⁹/L, INR > 1.5, aPTT prolonged)
- Use of anticoagulants or antiplatelets not discontinued as per protocol
- Uncontrolled hypertension (systolic BP > 160 mmHg)
- Pregnancy (relative contraindication requires multidisciplinary assessment)
Post-Procedure Emergency Red Flags
- Severe, worsening pain at biopsy site or flank
- Gross hematuria with blood clots or inability to urinate
- Dizziness, fainting, or rapid heart rate
- Active bleeding or expanding hematoma at puncture site
Patient FAQ & Clinical Guidance
1. What is a renal transplant biopsy with C4d and why is it performed?
A renal transplant biopsy with C4d immunohistochemistry is a specialised diagnostic procedure that detects antibody-mediated rejection by identifying the complement fragment C4d deposited in peritubular capillaries of the graft. It is performed when there is unexplained graft dysfunction, rising serum creatinine, new-onset proteinuria, or detection of donor-specific antibodies. The result provides a definitive Banff classification that directly informs whether intensification or reduction of immunosuppressive therapy is required.
2. How is the biopsy performed and is it painful?
The biopsy is performed using real-time ultrasound guidance with a spring-loaded core needle under local anaesthesia. Patients receive subcutaneous lidocaine infiltration at the puncture site, and the needle pass takes approximately one to two seconds. Most patients report only transient pressure and minimal discomfort. The entire procedure from preparation to post-biopsy observation typically requires two to three hours within the hospital radiology suite. Significant pain is uncommon; however, if you experience severe discomfort during the procedure, the radiologist can pause and administer additional local anaesthetic.
3. How long do results take and what do they mean?
Results are reported within 5 working days. A positive C4d score (C4d2 or C4d3 by Banff 2019 criteria) indicates active antibody-mediated rejection requiring immediate intervention with plasmapheresis, intravenous immunoglobulin, or augmented immunosuppression. A negative C4d result (C4d0 or C4d1) helps exclude this diagnosis, though correlation with donor-specific antibody status remains essential. The final report includes scores for glomerulitis, arteritis, interstitial inflammation, tubular atrophy, and interstitial fibrosis, providing a complete picture of graft health.
4. What are the risks of the biopsy procedure itself?
The primary risks include perinephric haematoma (clinically significant in approximately 1–2% of cases), gross haematuria (resolving spontaneously in the majority), arteriovenous fistula formation (0.5–1%), and infection at the puncture site. Serious complications requiring blood transfusion or surgical intervention are rare, occurring in fewer than 0.1% of procedures in experienced centres. Patients are monitored for four to six hours post-biopsy with vital signs and urine inspection before discharge.
UAE Regulatory & Data Privacy Adherence
This diagnostic service operates in full compliance with Federal Decree-Law No. 45 of 2021 on Personal Data Protection (PDPL) and Federal Law No. 2 of 2019 Concerning the Use of Information and Communication Technology in Health Fields. All patient health information, biopsy images, and histopathology reports are encrypted during transmission and storage, with access restricted to authorised laboratory personnel and the referring physician. Clinical safety and patient consent procedures adhere to Federal Decree-Law No. 4 of 2016 on Medical Liability.
Clinical & Logistical Metadata
| Test Name | Renal Transplant Biopsy with C4d Immunohistochemistry (Without Immunofluorescence) |
| Price (AED) | 900 AED |
| Turnaround Time | 5 Working Days |
| Sample Type / Matrix | Core Needle Renal Biopsy Tissue – Formalin-Fixed Paraffin-Embedded (FFPE) Block. Hospital Extraction Only – Sample collection is conducted strictly within an accredited hospital facility; mobile home phlebotomy is disabled for safety. |
| Methodology Used | Histopathology (H&E, PAS, Masson Trichrome, Silver Methenamine) + Immunohistochemistry (C4d polyclonal antibody, Ventana BenchMark Ultra autostainer, OptiView DAB detection system) + Banff 2019 Classification Scoring |
| ICD-10-CM Code | T86.11 (Kidney Transplant Rejection), Z94.0 (Kidney Transplant Status) |
| LOINC Code | 33774-9 (C4d [Presence] in Kidney tissue by Immunohistochemistry) |
| DHA Facility License & Address | DHA Facility License Number: 1143 — Premises 105, Floor 1, Building 33, Dubai Healthcare City, Dubai, UAE | Corporate Lab Branding: DNA Labs UAE |
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