Clinical usefulness of kidney biopsy in liver transplant recipients with renal impairment

Jong Hoon Lee, Yul Hee Cho, Seung Jee Ryu, Sin Seung Kim, Youn Hee Lee, In-Ae Jang, Bum Soon Choi, Jong Young Choi, Dong Goo Kim, Yeong Jin Choi, Chul Woo Yang, Byung Ha Chung, Jong Hoon Lee, Yul Hee Cho, Seung Jee Ryu, Sin Seung Kim, Youn Hee Lee, In-Ae Jang, Bum Soon Choi, Jong Young Choi, Dong Goo Kim, Yeong Jin Choi, Chul Woo Yang, Byung Ha Chung

Abstract

Background: Chronic kidney disease is a common complication after liver transplantation. In this study, we analyzed the results of kidney biopsy in liver transplantation recipients with renal impairment.

Methods: Between 1999 and 2012, 544 liver transplants were performed at our hospital. We retrospectively analyzed the clinical and histological data of 10 liver transplantation recipients referred for kidney biopsy.

Results: The biopsies were performed at a median of 24.5 months (range, 3-73 months) after liver transplantation. The serum creatinine level was 1.81±0.5 mg/dL at the time of kidney biopsy. There were no immediate complications. The most common diagnosis was glomerulonephritis (GN), such as immunoglobulin A nephropathy (n=4), mesangial proliferative GN (n=1), focal proliferative GN (n=1), and membranous GN (n=1). Typical calcineurin inhibitor (CNI)-induced nephrotoxicity was detected in three cases (30%). Chronic tissue changes such as glomerulosclerosis, interstitial fibrosis, and tubular atrophy were present in 90%, 80%, and 80% of cases, respectively, and mesangial proliferation was detected in 40% of cases. We began treatment for renal impairment based on the result of kidney biopsy; for example, angiotensin-receptor blockers or steroids were prescribed for GN, and the CNI dose was reduced for CNI nephrotoxicity. As a result, eight of 10 patients showed improvement in glomerular filtration rate, but two progressed to end-stage renal disease.

Conclusion: Kidney biopsy is a safe and effective method for determining the cause of renal impairment after liver transplantation. Management of patients based on the result of kidney biopsy may improve renal outcomes.

Keywords: Calcineurin inhibitor; Chronic kidney disease; Kidney biopsy; Liver transplantation.

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