This clinical trial is focused on studying a condition known as Chronic Graft Versus Host Disease (cGVHD), which can occur after a stem cell transplant. The study is investigating the use of a medication called Ibrutinib, which is being tested in different forms such as a suspension for oral use, film-coated tablets, and hard capsules. The purpose of the study is to find the right dose and to assess the safety and effects of Ibrutinib in children and young adults with cGVHD.
The study is divided into two parts. In the first part, researchers aim to determine the appropriate dose of Ibrutinib for children aged 1 to under 12 years. In the second part, the focus is on understanding how the body processes the medication and its safety in participants aged 1 to under 22 years. Participants in the study may have moderate or severe cGVHD that has not responded to previous treatments. Some participants may also be newly diagnosed with cGVHD and require systemic immunosuppression, which is a treatment to reduce the activity of the immune system.
Throughout the study, participants will receive either Ibrutinib or a placebo. The study will monitor the response to the treatment over a period of time, including the duration of response and overall survival rate. Additionally, the study will observe the growth and development of pediatric participants. The trial is expected to continue until November 2025, with the aim of providing valuable information on the use of Ibrutinib in treating cGVHD in younger patients.



France
Germany
Italy
Spain
The Netherlands