A Survey of Darvadstrocel in People With Crohn's Disease

This is a survey study — not a treatment trial — looking at how well a medication called darvadstrocel (also known as Alofisel) works in real-world patients with Crohn's disease who have complex anal fistulas. Anal fistulas in Crohn's disease are abnormal tunnels between the gut and skin near the anus that can be very difficult to treat. Darvadstrocel is a cell-based therapy already approved in some countries for this condition, and this study collects data on outcomes after its use. **You may be eligible if...** - You have Crohn's disease with complex perianal (around the anus) fistulas - You have already received or are receiving darvadstrocel treatment - You are willing to participate and provide consent **You may NOT be eligible if...** - There are no formal exclusion criteria for this observational study This is a data collection study and does not involve any experimental treatments. Talk to your doctor to see if this trial is right for you.