ADSTILADRIN is a study to see how well a medicine called Adstiladrin works in real life. It involves people from the United States and Israel who are already getting this medicine. The study looks at how doctors and patients use the medicine and collects data about its effectiveness and any side effects. Adstiladrin is used to treat bladder issues, and this study doesn't change how doctors usually prescribe it. Participants must be 18 years or older and have started Adstiladrin after September 5, 2023. They cannot join if they are part of another clinical trial, have used Adstiladrin in a trial before, or are pregnant or breastfeeding.

• The study is observational, meaning participants will continue their usual treatment.
• No extra visits are needed beyond regular doctor visits.
• Participants must not be part of another trial or be pregnant.