This study checks if the medicine **guselkumab** is safe for kids with certain illnesses like ulcerative colitis (a disease causing tummy pain and diarrhea), Crohn's disease (another tummy illness), and juvenile psoriatic arthritis (a joint problem). Guselkumab is given through an injection under the skin. The study is for kids who have already tried guselkumab and found it helpful.
Who can join? Kids who finished a previous guselkumab study and are getting better, and have a parent or guardian who agrees to the study's rules. Kids who could have babies must not be having sex, or must use protection if they are.
Who can’t join? Kids over 18 in countries where the medicine is approved, kids under 18 in those countries, pregnant or nursing kids, or kids using other treatments not allowed in the study. Also, anyone part of the study team or their family members can’t join.
- Study duration depends on each participant's condition and response.
- Regular check-ups are required to monitor safety and progress.
- No financial compensation is mentioned.