Surveillance of High-grade Non-muscle Invasive Bladder Tumours Using the Xpert Bladder Cancer Monitor

Inclusion Criteria: * Age ≥18 years of age at the time of signing the Informed Consent Form * Ability to understand the Participant Information sheet orally and in writing * Signed Informed Consent Form * Is, according to the investigator's judgement, able to comply with the trial protocol * Previously diagnosed with high grade NMIBC Recurrence free at the time of inclusion detected by flexible cystoscopy Exclusion Criteria: * History of any upper urinary tract tumor regardless of grade and stage within the last 5 years prior to randomization * T1 tumor where re-resection has not been performed * CIS or invasive tumor within 3 months before randomization