Dzerzhinsk

This research aims to collect long-term safety and effectiveness data for participants treated with ibrutinib, a medicine used for various blood cancers and conditions including Chronic Lymphocytic Leukemia, Small Lymphocytic Lymphoma, Mantle Cell Lymphoma, Follicular Lymphoma, Diffuse Large B-cell Lymphoma, Waldenstrom Macroglobulinemia, and Chronic Graft Versus Host Disease. It also provides ongoing access to ibrutinib for participants who have completed previous ibrutinib studies, continue treatment, and benefit from it. This is an open-label Phase 3b study without formal hypothesis testing. Participants will continue their current ibrutinib dosing regimen from the prior study, taken orally once daily as capsules in doses of 560 mg, 420 mg, 280 mg, or 140 mg, around the same time each day. Treatment continues until the investigator decides the participant no longer benefits due to disease progression or side effects, the participant withdraws, alternative ibrutinib access becomes available, or the study ends. Participants not able to access ibrutinib elsewhere can keep receiving the single-agent ibrutinib until all transition or stop treatment, or until the study is stopped. During the study, safety is monitored throughout and summarized, and effectiveness may be analyzed together with previous study data. The main outcome measured is the number of participants experiencing any adverse events within 30 days after the last dose or until starting another cancer treatment. Participants will undergo assessments including pregnancy testing and investigator evaluations to ensure ongoing benefit and safety. The study duration depends on when participants stop treatment or transition to other access.