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NCI Dictionary of Cancer Terms

tositumomab  listen  (TAH-sih-TOO-moh-mab)

  A drug used together with another drug to treat certain types of B-cell non-Hodgkin lymphoma. It is also being studied in the treatment of other types of cancer. Tositumomab binds to a protein called CD20, which is found on the surface of B cells, and may kill cancer cells. It is a type of monoclonal antibody.