Multiple Gouty Arthritis With Tophi Formation in a Patient With End-Stage Kidney Disease Treated After Kidney Transplant

초록

Background. Hyperuricemia is a common condition in patients with chronic kidney disease and end-stage kidney disease. It occurs even after kidney transplant because of the use of calcineurin inhibitors and transplanted kidney failure. We describe the case of a patient with end-stage kidney disease who had multiple gouty arthritis with tophi formation despite receiving appropriate treatment but was successfully cured after kidney transplant. Case Report. A 36-year-old male patient undergoing hemodialysis treatment was treated with febuxostat for multiple gouty arthritis and underwent tophi removal twice. He received a deceased donor kidney transplant 10 years after dialysis treatment. He received immunosuppressants (basiliximab, tacrolimus, mycophenolate mofetil) and steroids. Results of renal biopsy performed on days 7 and 21 postoperation showed no specific findings and normal renal function. The uric acid level before transplant was 3.1 mg/dL, and when renal function was normal, it reached 6-7 mg/dL and remained stable. Although hyperuricemia was still present, the tophi disappeared 3 months after transplant. It is presumed that the high-dose steroids interfered with the activation of inflammatory responses during tophi formation, which may have caused the tophi to disappear. It is also presumed that the patient adhered to the diet well after transplant, which suppressed tophi formation. Conclusions. Our findings suggest that disappearance of multiple tophi and arthritis in patients undergoing hemodialysis can be achieved with kidney transplant, especially when uric acid-lowering drugs are not effective.

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