In cancer treatment today, three letters have infiltrated the oncology dialect: "mab," as in rituximab (Rituxan), tositumomab (Bexxar), or Ibritumomab tiuxetan (Zevalin). This suffix is reserved formonoclonal antibodies - agents that have become a growing component of the oncologist's arsenal.
Currently, eight monoclonal antibodies, or MAbs, are approved by the FDA to treat cancer. And many more are being tested in phase II and III clinical trials for a variety of tumor types.