The introduction of monoclonal antibodies has been a milestone in the treatment of hematologic neoplasms. The CD20 antibody rituximab has been a trailblazer and represents meanwhile a fixed combination partner of different first- and second-line chemotherapies in CD20-positive B-cell-non-Hodgkin's lymphoma (NHL). Rituximab maintenance is established in follicular lymphoma. The drug is also used for the treatment of non-malignant hematologic diseases (i.e. immunthrombocytopenia). Rituximab was followed by the CD52 antibody alemtuzumab and recently by the CD20 antibody ofatumumab for the therapy of CLL and the radioimmunconjugate ibritumomab-tiuxetan indicated for the treatment of refractory or relapsed CD20-positive follicular lymphoma or as consolidation after induction chemotherapy. In the near future, approval of several new antibodies is expected. For the treatment of refractory or relapsed Hodgkin's lymphoma and relapsed systemic anaplastic large cell lymphoma, the CD30 antibody brentuximab vedotin has been shown to be a highly active new treatment option.
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