^{Immunology and Oncology}

Antibody marks the cancer cell and makes it easier for the immune system to find. The monoclonal antibody drug rituximab (Rituxan) attaches to a specific protein (CD20) found only on B cells, one type of white blood cell. Certain types of lymphomas arise from these same B cells. Monoclonal antibodies can also function by attenuating hyperactive growth signals neoangiogenesis. A monoclonal antibody can be conjugated to a radioactive particle that will ensure directed delivery to the cancer cell and slow and long release of the radiation, hence maximizing chances of the positive outcome and minimizing non-specific damaging exposure to radiation.