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Background: Radical prostatectomy for de novo prostate cancer (PCa) among kidney transplant (KT) recipients (KTRs) can be challenging because of the location of the renal allograft, which may make robot-assisted radical prostatectomy (RARP) difficult to perform. In this study, we present the first case of RARP in a patient with two renal allografts in both iliac fossae. Case Presentation: A 72-year-old KTR was found to have organ-confined PCa. He had a first KT (in the right iliac fossa) 20 years ago, which he lost because of chronic allograft nephropathy, followed by a second KT (in the left iliac fossa) 8 years ago, which is now functioning well. We performed RARP with a right-nerve sparing technique. The surgical duration was 208 minutes, with an estimated blood loss of 50 mL and no intraoperative complications. The postoperative course was unremarkable. During the 21-month follow-up period, there was no incontinence or biochemical recurrence and the allograft function remained normal. Conclusion: RARP is feasible and can be performed safely in KT patients with two renal allografts in the pelvis.

To determine the appropriate template of regional lymph node dissection (LND) at the time of laparoscopic nephroureterectomy (LNU) for patients with clinically node- negative urothelial carcinoma of the upper urinary tract.This prospective study included 45 patients undergoing LND with LNU in accordance with our prospective rules regarding the area of LND. Perioperative, pathologic, and follow-up data were collected. Micrometastasis in lymph nodes (LNs) was later evaluated by immunohistochemistry (IHC). Recurrence-free survival (RFS) was calculated with the Kaplan-Meier method.The median number of LNs removed was 14 (range 1-33). One patient with pT3 disease had node metastasis based on routine pathologic examination, and IHC revealed micrometastases in two additional patients (pT2 in one and pT3 in one). Therefore, 15% (3/20) of patients with ≥pT2 disease had node disease. After surgery, six patients experienced minor complications (Grade 1 or 2), and Grade 5 gastrointestinal bleeding after aspiration pneumonia developed in one elderly male patient on the 45th postoperative day, which was not considered to be associated with LND. At the last follow-up, lung metastasis developed in four patients (pT1 in one, pT2 in one, and pT3 in two), and presacral lymph node metastasis developed in one patient with a lower ureteral tumor (pT2), which was not included in our prospective template for a lower ureteral tumor. LN recurrence within/ near the LND area was not observed in patients with pelvic/upper ureteral carcinoma. The 2-year nonurothelial RFS rate was 84%.We consider that the present template represents regional LNs for patients with clinically node-negative pelvic/upper ureteral carcinoma, while presacral LNs may be incorporated into the regional LND template for patients with clinically node-negative lower ureteral carcinoma.