Radiation treatment for cancer
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Qu.1 Radiation treatment for cancer is either delivered externally to the cancer site by machine, or delivered through the implantation of radioactive material directly at the cancer site (Treatments, 2004). It is sometimes used to shrink tumors prior to surgery, but is used most often after surgery to kill any tumor cells which may remain. The damage from radiation is usually localized, though it can be destructive to surrounding tissues it passes through. Also, with large tumors, oxygen-lacking cells in the center are not dividing as rapidly and so will not be destroyed because radiation only destroys dividing cells, so radiation is not suitable for use on larger tumor cell masses. Chemotherapy involves the administration of drugs, intravenously and/or orally to destroy the cancer cells (Treatments, 2004). The problem with chemotherapy is that the drugs are not tumor-specific and are usually directed at killing dividing cells. This results in the side effects such as nausea (due to killing of cells of the digestive tract) and loss of hair. It is effective, but the side effects are severe. Also, chemotherapy may not be able to kill all the cancer cells, and cannot prevent them from returning. Biological therapies may use monoclonal antibodies developed to the tumor with the hope of killing off just the tumor cells and leaving healthy cells unharmed (Treatments, 2004). They may also be aimed at boosting the bodyÆs own defense systems to defeat the cancer. The ad
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Qu3 Neutropenia, Qu1 Radiation, Retrieved November, Qu2 Actual, References Acute, 2004 retrieved november, retrieved november 30, 2004 retrieved, november 30 2004, 30 2004, retrieved november, november 30, tumor cells, treatments 2004, acute lymphocytic leukemia, acute lymphocytic, lymphocytic leukemia, cancer cells, anemia ear infection, fresh flowers,
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Approximate Pages = 3 (250 words per page)
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