TReatment Approaches and bIomarkers preValence in bladdEr Cancer in RuSsian Federation

This study collects real-world data on how bladder cancer is diagnosed and treated across Russia, and looks for biomarkers (biological signals) in tumor tissue that may predict how well patients respond to treatment. **You may be eligible if...** - You are 18 years old or older - You have a confirmed diagnosis of urothelial bladder cancer at any stage (non-muscle-invasive, muscle-invasive, or metastatic) - You have had a tumor tissue biopsy that can be tested - You are willing to sign a consent form including permission for tumor tissue testing **You may NOT be eligible if...** - Your bladder cancer diagnosis was not recently confirmed as per study criteria - You do not have suitable tissue samples available - You are unable to attend the required follow-up visits Talk to your doctor to see if this trial is right for you.