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iodine I 131 tositumomab (I-oh-dine I 131 TAH-sih-TOO-moh-mab)

 A monoclonal antibody (tositumomab) that has been chemically changed by adding radioactive iodine, and that is used in the treatment of certain types of non-Hodgkin lymphoma. It belongs to the family of drugs called radioconjugated monoclonal antibodies. When iodine I 131 tositumomab and tositumomab are given together, the combination is called the Bexxar regimen.

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