Upper tract urothelial carcinomas (UTUC) are relatively uncommon compared to bladder cancer and account for only 5-10% of urothelial carcinomas [Munoz et al., 2000; Siegel et al., 2012; Rouprêt et al. 2015], with an estimated annual incidence in Western countries of ~2 cases per 100,000 inhabitants. In 17% of cases, concurrent bladder cancer is present [Cosentino et al., 2013].