This clinical trial is focused on providing continued treatment for participants who have been previously enrolled in studies involving the medication Itacitinib (also known by its code name INCB039110). The diseases being studied in this trial include Myelofibrosis, a condition where scar tissue forms in the bone marrow, chronic graft-versus-host disease, which can occur after a stem cell or bone marrow transplant, and bronchiolitis obliterans syndrome (BOS) that can develop after a lung transplant.
The purpose of this study is to continue evaluating the safety of Itacitinib for participants who are experiencing clinical benefits from this treatment. Participants will continue to receive the medication in tablet form, taken orally, as part of their ongoing care. The study is designed to monitor any side effects or adverse events that may occur while participants are on this medication.
Throughout the study, participants will have scheduled visits to ensure their treatment is progressing safely and effectively. The study aims to provide a seamless transition for those who have been benefiting from Itacitinib in previous trials, allowing them to continue their treatment under careful observation. The study is expected to run until 2027, ensuring long-term support and monitoring for participants.



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