Overview
Failed renal transplant refers to the scenario where a transplanted kidney ceases to function adequately, potentially due to complications such as acute rejection, acute tubular necrosis, or other post-transplant complications.Diagnosis
Dynamic scintiscanning with technetium-99m: Useful for assessing renal vasculature integrity and differentiating acute tubular necrosis from acute rejection 2.
Clinical signs and symptoms: Oliguria, elevated creatinine levels, and signs of graft dysfunction.
Laboratory tests: Elevated serum creatinine, blood urea nitrogen (BUN), and urinalysis abnormalities.
Imaging: Ultrasound to evaluate graft size, echogenicity, and hydronephrosis.
Biopsy: Kidney biopsy remains definitive for diagnosing acute rejection or other histopathological causes 2.Management
Acute tubular necrosis: Supportive care, fluid management, and monitoring; may require temporary dialysis 2.
Acute rejection: Immunosuppressive therapy adjustment, often involving increased doses of anti-rejection medications like tacrolimus or mycophenolate mofetil 2.
Colchicine-induced myoneuropathy: Prompt discontinuation of colchicine; supportive care for symptoms; monitor creatine kinase levels 1.Special Populations
Renal transplant recipients on colchicine: Higher risk of colchicine-induced myoneuropathy due to concurrent immunosuppression and potential renal impairment 1.Key Recommendations
Utilize technetium-99m scintiscanning to differentiate acute tubular necrosis from acute rejection in post-transplant oliguric patients (Evidence: Moderate 2).
Promptly discontinue colchicine in renal transplant patients presenting with myopathy or neuropathy, expecting rapid clinical improvement (Evidence: Weak 1).
Adjust immunosuppressive therapy based on biopsy findings for suspected acute rejection (Evidence: Expert opinion 2).References
1 Dupont P, Hunt I, Goldberg L, Warrens A. Colchicine myoneuropathy in a renal transplant patient. Transplant international : official journal of the European Society for Organ Transplantation 2002. link
2 Nirmul G, Rudausky A, Burrows L. Dynamic scintiscanning with technetium-99m as a diagnostic aid in oliguria after renal transplant. South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde 1976. link