How effective is rituximab in the treatment of Waldenström macroglobulinemia?

Updated: May 29, 2020
  • Author: Karen Seiter, MD; Chief Editor: Emmanuel C Besa, MD  more...
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Answer

Rituximab, an anti-CD20 monoclonal antibody, produces response rates of 20-50% irrespective of prior exposure to chemotherapy. Response to rituximab may be affected by polymorphisms in the Fc-gamma RIIIA (CD16) receptor gene. [28] Time to response is slow and exceeds 3 months on average. The flare phenomenon (abrupt increase of IgM paraprotein level) has been described, which may result in hyperviscosity syndrome and require plasmapheresis. [35]


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