For decades, cancer therapy has meant surgery, radiation, or both. These therapies will succeed for about one-third of all cancer patients (a total of about 655,000 new cases were diagnosed during 1974), especially when the cancers are detected before they metastasize and seed additional tumors in other parts of the body. But surgery and radiation are limited in that they are suitable only for localized tumors. Certain diffuse cancers, such as the leukemias and lymphomas, are not amenable to these therapies at all. Moreover, metastases, which may be far away from the site of the primary tumor and clinically undetectable, may escape destruction. A single cancer cell left alive can spell a patient’s doom.
KeywordsAcute Lymphocytic Leukemia Cancer Therapy Gamma Radiation Energy Neutron High Energy Neutron
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