Dear Editor I refer to the article entitled "Could surgical experience of adult endourologist overcome the learning curve of retrograde intrarenal surgery in children?" We compared the RIRS results of patients who underwent regular surgery ( I n i : 13) and operated in live surgery events ( I n i : 14) at the same period and same centers. The aim of this study, which was not previously reported in the literature, was to investigate the effect of live surgical events on the success and complication rates of the RIRS.