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Introduction: The left kidney is often preferred for living donor kidney transplantation because of its anatomical advantages. However, the right kidney may be procured due to donor conditions. Few studies have assessed the safety and graft outcome of right retroperitoneal laparoscopic donor nephrectomy (RDN). This study aimed to compare the outcomes between right and left RDN with respect to donor outcome and the graft function of recipients. Methods: This retrospective study included 230 consecutive living donor kidney transplants performed at our institution between May 2019 and March 2023. We reviewed the outcomes of kidney transplant in the right and left kidneys after RDN. Results: A total of 230 living donor kidney transplants were performed, with 32 donors receiving right RDN (right RDN group) and 198 donors receiving left RDN (left RDN group). The renal veins and ureters were significantly shorter in the right RDN group than in the left RDN group (both p <.001). Donor operation and warm ischemia time were significantly longer in the right RDN group than in the left RDN group (p =.012 and p <.001, respectively). None of the groups exhibited any cases of delayed graft function owing to donor‐related reasons. Perioperative changes in the estimated glomerular filtration rate of recipients and death‐censored graft survival were not significantly different between the two groups. Conclusions: In RDN, the outcomes of right donor nephrectomy were comparable to those of left donor nephrectomy in terms of donor safety and recipient renal function. [ABSTRACT FROM AUTHOR]

Introduction: Donor–recipient (D/R) size mismatch has been evaluated for a number of organs but not for pancreas transplantation. Methods: We retrospectively evaluated 438 patients who had undergone pancreas transplantation. The D/R body surface area (BSA) ratio was calculated, and the relationship between the ratio and graft prognosis was evaluated. We divided the patients into two groups and evaluated graft survival. The incidence of pancreas graft thrombosis resulting in graft failure within 14 days and 1‐year graft survival were compared using Kaplan–Meier curves, and the prognostic factors associated with graft thrombosis were identified by univariate and multivariate analyses. Results: The mean/median donor and recipient BSAs were 1.63 m2/1.65 m2, and 1.57 m2/1.55 m2, respectively; the mean and median D/R BSAs were both 1.05. The receiver operating characteristic curve cutoff for the D/R BSA ratio was 1.09, and significant differences were identified between patients with ratios of ≥1.09 (high group) versus <1.09 (low group). The incidence of graft thrombosis resulting in pancreas graft failure within 14 days was significantly higher in the high group than in the low group (p <.01). One‐year overall and death‐censored pancreas graft survival were significantly higher in the low group than in the high group (p <.01). Multivariate analysis identified recipient height, donor BSA, and donor hemoglobin A1c as significant independent factors for graft thrombosis. Cubic spline curve analysis indicated an increased risk of graft thrombosis with increasing D/R BSA ratio. Conclusion: D/R size mismatch is associated with graft thrombosis after pancreas transplantation. [ABSTRACT FROM AUTHOR]