Upper tract urothelial carcinoma (UTUC) is a rare but lethal disease. About 60% of tumours are invasive at the time of diagnosis. Radical nephroureterectomy (RNU) has been the standard treatment of UTUC. However, a number of studies have indicated that kidney-sparing surgery (KSS) and treatment with radical nephroureterectomy (RNU) offer equivalent long-term CSS if the right patients are selected [1, 2]. …