Zanubrutinib in Patients With Waldenström's Macroglobulinemia, Chronic Lymphocytic Leukemia, Marginal Zone Lymphoma and Follicular Lymphoma

Inclusion Criteria: * Waldenström's macroglobulinemia (all treatment lines) OR * Chronic lymphocytic leukemia (all treatment lines) OR * Marginal zone lymphoma (≥2 treatment line and at least one anti-CD20 antibody-based previous therapy) * Follicular lymphoma (≥3 treatment line) * Signed and dated informed consent form * Treatment with zanubrutinib according to current SmPC for WM, CLL and MZL * Treatment with zanubrutinib + obinutuzumab for FL according to current SmPC * Treatment decision before inclusion into this non-interventional study * Age ≥18 years. Exclusion Criteria: * Contraindications according to SmPC for patients with WM, CLL, MZL or FL * Participation in an interventional clinical trial during zanubrutinib treatment.