I would like to thank Stuart M. Flechner, who is one of the eminent researchers of this issue, for his interpretations and comments on our article. Right donor nephrectomy is reserved for instances in which the left kidney is determined to be unacceptable for transplantation. The indications most often cited are multiple left renal arteries or veins, anomalous left anatomy, smaller right kidney, or a cystic mass in the right kidney. 1 Mandal A.K. Kalligonis A.N. Cohen C. et al. Should the right kidney be used in laparoscopic live donor nephrectomy?. Transplantation. 2000; 69: S403 Crossref Google Scholar , 2 Arenas J. Gupta M. Barnett K. et al. Initial program experience with right laparoscopic donor nephrectomy. Transplantation. 2000; 69: S335 Crossref Google Scholar In our case, the diethylenetriamine pentaacetic acid-determined glomerular filtration rate of the left kidney was 68.85 mL/min/1.73 m2 and that of the right kidney was 45.78 mL/min/1.73 m2. Thus, the left kidney functioned better. In addition, the distance of the left renal vein from the hilus to the retroaortic area was 51.1 mm, and the distance of the right renal vein from the hilus to its point of drainage into the inferior vena cava was 31.2 mm. On the basis of the principle of leaving the better kidney to the donor, we preferred to use the right kidney despite its shorter vein, believing that the operation could be performed without placing the donor or the kidney at great risk. Likewise, in a study by the Johns Hopkins group, 3 Buell J.F. Edye M. Johnson M. et al. Are concerns over right laparoscopic donor nephrectomy unwarranted?. Ann Surg. 2001; 233: 645-651 Crossref PubMed Scopus (97) Google Scholar of the 96 patients in whom the right kidney was preferred, 6 had a retroaortic left renal vein. In our patient, the retroaortic vein was duplicated as a deviation from the normal. Despite all these considerations, as also mentioned in the editorial comment, “in the end when making donor decisions, just do the right thing.” Why We Did Not Use Left Side for This DonorUrologyVol. 74Issue 1PreviewWe describe a case of an unusual variation of the double retroaortic left renal vein discovered during routine donor examination of the abdomen by multidetector computed tomography. A 53-year-old man underwent evaluation in our department as a potential renal donor for his brother who had end-stage renal failure. Multidetector computed tomography angiography showed double retroaortic left renal veins. This can increase the potential for serious morbidity and mortality in the donor. We prefer right kidney for potential donation. Full-Text PDF Editorial CommentUrologyVol. 74Issue 1PreviewThe practice of live renal donation remains a competition between minimization of the risk to the healthy donor and the ease of reimplantation of the donated kidney. One of the bedrock principles underpinning the practice of live renal donation is leaving the donor with the better kidney, whenever a discrepancy exists between the 2. If both are equal, the left kidney is generally preferred by recipient surgeons owing to the increased length and often thicker wall of the renal vein compared with the right. Full-Text PDF