Midterm Outcome of Kidney Transplantation from Donors with Thin Basement Membrane Nephropathy

AbstractBackgroundThin basement membrane nephropathy (TBMN) is the most common cause of persistent glomerular hematuria. Most individuals with TBMN show a benign course, although it can be difficult to distinguish it from early stages of progressive renal diseases. However, only limited studies address the prognosis of donors with TBMN and their recipients.MethodsFrom 2007 to 2016, 11 recipients received kidney grafts from donors with TBMN, and their clinical data were analyzed retrospectively. Follow-up protocol kidney biopsies were given to the recipients at 10 days and 1 year after transplantation. The donors were also received a follow-up evaluation of their renal function and were interviewed via telephone survey.ResultsAll donors were living, and their kidney grafts showed TBMN on pre-transplantation biopsy. The recipients were followed for 57.4 ± 28.6 months posttransplantation. Seven recipients showed acute rejection by a median of 9.7 months and all recipients recovered their renal function after treatment. Although 1 kidney failed due to graft arterial occlusion, the functions of the others were preserved during the follow-up period. The donors were followed for 41.0 ± 39.1 months and additionally contacted via telephone survey (in total, 56.8 ± 32.0 months). All the donors maintained their renal function upon clinical follow-up without significant complications and denied any discomfort at the time of the telephone interview.ConclusionsKidney transplant donors with TBMN and their recipients maintained their renal function through midterm follow-up without significant complications. Therefore, kidney transplantation from donors with TBMN could be a safe option. Background Thin basement membrane nephropathy (TBMN) is the most common cause of persistent glomerular hematuria. Most individuals with TBMN show a benign course, although it can be difficult to distinguish it from early stages of progressive renal diseases. However, only limited studies address the prognosis of donors with TBMN and their recipients. Methods From 2007 to 2016, 11 recipients received kidney grafts from donors with TBMN, and their clinical data were analyzed retrospectively. Follow-up protocol kidney biopsies were given to the recipients at 10 days and 1 year after transplantation. The donors were also received a follow-up evaluation of their renal function and were interviewed via telephone survey. Results All donors were living, and their kidney grafts showed TBMN on pre-transplantation biopsy. The recipients were followed for 57.4 ± 28.6 months posttransplantation. Seven recipients showed acute rejection by a median of 9.7 months and all recipients recovered their renal function after treatment. Although 1 kidney failed due to graft arterial occlusion, the functions of the others were preserved during the follow-up period. The donors were followed for 41.0 ± 39.1 months and additionally contacted via telephone survey (in total, 56.8 ± 32.0 months). All the donors maintained their renal function upon clinical follow-up without significant complications and denied any discomfort at the time of the telephone interview. Conclusions Kidney transplant donors with TBMN and their recipients maintained their renal function through midterm follow-up without significant complications. Therefore, kidney transplantation from donors with TBMN could be a safe option. Corresponding author: Sang-il Min, Division of Transplantation and Vascular Surgery, Department of Surgery, Seoul National University Hospital, 101, Daehak-ro, Jongno-gu, Seoul, 03080, Rep. of Korea (surgeonmsi@gmail.com) Authorship C.C. participated in study design, data acquisition, data analysis, interpretation, and writing of the article. S.A. participated in study design, data analysis, and interpretation. S-K.M. participated in study design, data analysis, and interpretation. J.H. participated in study design, interpretation, and writing of the article. C.A. participated in study design, data acquisition, and interpretation. Y.K. participated in study design, data acquisition, and interpretation. H.L. participated in study design, data acquisition, and interpretation. S-i.M. participated in study design, data acquisition, data analysis, interpretation, and writing of the article. Disclosure The authors declare no conflicts of interest. Funding None Copyright © 2018 Wolters Kluwer Health, Inc. All rights reserved.

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