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      No Tumor-Free Waiting Period after Treatment of Multilocular Cystic Renal Cell Carcinoma: A New Case and Review of the Literature

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          Most pretransplant malignancies require a tumor-free waiting period before transplantation. End-stage renal disease (ESRD) patients have an increased risk of renal cell carcinoma (RCC), which is mostly detected from routine screening during pre-kidney transplant evaluation. RCC must be quiescent prior to kidney transplantation. However, the tumor-free waiting period for RCC varies depending on the types of RCC. Multilocular cystic RCC (MCRCC), one subtype of clear cell RCC, has low malignant potential and may not require a tumor-free waiting period. We report a case of an ESRD patient with a newly diagnosed MCRCC that was found during routine pre-kidney transplant evaluation. A plan for kidney transplantation within 6 months of successful tumor removal by nephrectomy was made. The literature regarding MCRCC in kidney transplantation is reviewed.

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          Most cited references 30

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          Conversion from calcineurin inhibitors to sirolimus maintenance therapy in renal allograft recipients: 24-month efficacy and safety results from the CONVERT trial.

           Daniel Brennan,  ,  F Schena (2009)
          The efficacy and safety of converting maintenance renal transplant recipients from calcineurin inhibitors (CNIs) to sirolimus (SRL) was evaluated. Eight hundred thirty renal allograft recipients, 6 to 120 months posttransplant and receiving cyclosporine or tacrolimus, were randomly assigned to continue CNI (n=275) or convert from CNI to SRL (n=555). Primary endpoints were calculated Nankivell glomerular filtration rate (GFR; stratified at baseline: 20-40 vs. >40 mL/min) and the cumulative rates of biopsy-confirmed acute rejection (BCAR), graft loss, or death at 12 months. Enrollment in the 20 to 40 mL/min stratum was halted prematurely because of a higher incidence of safety endpoints in the SRL conversion arm. Intent-to-treat analyses at 12 and 24 months showed no significant treatment difference in GFR in the baseline GFR more than 40 mL/min stratum. On-therapy analysis of this cohort showed significantly higher GFR at 12 and 24 months after SRL conversion. Rates of BCAR, graft survival, and patient survival were similar between groups. Median urinary protein-to-creatinine ratios (UPr/Cr) were similar at baseline but increased significantly after SRL conversion. Malignancy rates were significantly lower at 12 and 24 months after SRL conversion. Post hoc analyses identified a subgroup with baseline GFR more than 40 mL/min and UPr/Cr less than or equal to 0.11, whose risk-benefit profile was more favorable after conversion than that for the overall SRL conversion cohort. At 2 years, SRL conversion among patients with baseline GFR more than 40 mL/min was associated with excellent patient and graft survival, no difference in BCAR, increased urinary protein excretion, and a lower incidence of malignancy compared with CNI continuation. Superior renal function was observed among patients who remained on SRL through 12 to 24 months, particularly in the subgroup of patients with baseline GFR more than 40 mL/min and UPr/Cr less than or equal to 0.11.
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            An update of the Bosniak renal cyst classification system.

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              Malignancy in renal transplantation.


                Author and article information

                Am J Nephrol
                American Journal of Nephrology
                S. Karger AG
                September 2014
                22 August 2014
                : 40
                : 2
                : 151-156
                aRenal Division, Department of Medicine, and bDepartment of Pathology and Laboratory Medicine, Emory University School of Medicine, and cDepartment of Medicine, Morehouse School of Medicine, Atlanta, Ga., USA
                Author notes
                *James L. Bailey, MD, Renal Division, Department of Medicine, Emory University School of Medicine, Woodruff Memorial Research Building, Room 338, 1639 Pierce Drive, Atlanta, GA 30322 (USA), E-Mail jlbaile@emory.edu
                365201 Am J Nephrol 2014;40:151-156
                © 2014 S. Karger AG, Basel

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                Page count
                Figures: 4, Tables: 1, Pages: 6
                Nephrology Grand Rounds


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