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Concerning follow-up in bladder cancer, it must be distinguished between superficial, muscle-invasive, and metastatic tumors. In superficial bladder cancer, urethrocystoscopy is still standard for follow-up. Frequency depends on the risk classification. Even muscle-invasive carcinomas, which underwent a R0 resection, will metastasize in about 30% of cases. These tumors as well as primarily metastasized cancer cannot be cured. Therefore, in these cases, one should not speak about follow-up but therapeutic control. Nonetheless, even in these cases the S3 guideline recommends regular follow-up examinations because new therapeutic options can clearly improve patient survival. Possible complications of urinary diversions need consideration during follow-up., (© 2022. The Author(s), under exclusive licence to Springer Medizin Verlag GmbH, ein Teil von Springer Nature.)