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Cancer Tumour Essay

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Radio Therapy
A cancer tumour is an abnormal growth of tissue which serves no purpose but can cause server damage. Tumours invade surrounding tissues, spread to other organs and can eventually lead to the patient's death if untreated. It is caused by abnormal uncontrolled cell growth, in a healthy body cells die and replace in a controlled way. When damage occurs to the genetic material of cells either from environmental or internal factors can result with cells that do not die and continue to multiply. This causes a mass of cancer cells or a tumour to develop. Radiation therapy uses high-energy radiation to shrink tumours and kill cancer cells. Gamma rays, X-rays and charged particles are types of radiation used to treat cancer. This can be delivered by a machine outside the body which is called external beam radiation therapy. It can also come from a radioactive material placed in the body near the tumour, this is called brachytherapy. Another type of radiation therapy uses radioactive substances such as radioactive iodine to travel through the blood to kill cancer cells.It kills cancer cell...

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