This randomized clinical multicentre trial aims to evaluate the efficacy of microsatellite analysis on voided urine to detect tumour recurrences in the follow-up of patients with superficial urothelialcell carcinoma (UCC). Further, this study aims to identify subgroups of patients with a low risk of tumour recurrence using clinico-pathologic tumour characteristics in combination with a genetic marker (FGFR3 gene), such that the frequency of follow-up contact can be reduced. The overall objective is to reduce the frequency of cystoscopy during follow-up in patients with superficial UCC, leading to an improvement in quality of life at equal or lower costs. This study evaluates the cost-effectiveness of follow-up in bladder cancer.