This clinical trial is focused on studying the effects of a medication called filgotinib on certain rare diseases. The diseases being studied are Idiopathic Inflammatory Myopathies, Behçet’s Disease, and IgG4-related Disease. These are conditions where the immune system mistakenly attacks the body’s own tissues, leading to inflammation and other symptoms. The medication filgotinib is taken in the form of film-coated tablets and is known as a JAK-inhibitor, which means it works by blocking certain enzymes in the body that are involved in the immune response.
The purpose of this study is to see how filgotinib affects the quality of life, disease activity, and safety in patients who have these conditions and have not responded well to other treatments. Participants in the study will receive either filgotinib or a placebo, and their progress will be monitored over a period of time. The study will look at various aspects of the diseases, such as the number of oral ulcers, skin disease severity, and overall disease activity, to determine how well the treatment is working.
Throughout the study, participants will be asked to complete forms and assessments to help researchers understand the impact of the treatment on their symptoms and daily life. The study aims to provide valuable information on the potential benefits and safety of using filgotinib for these rare immune-mediated inflammatory diseases. The results could lead to improved treatment options for patients with these challenging conditions.



The Netherlands