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Target theory concerns the models of how radiation kills biological cells and is based around two main postulates: "Radiation is considered to be a sequence of random projectiles; the components of the cell are considered as the targets bombarded by these projectiles" [6] Several models have been based around the above two points.
Radiation therapy is used mainly in the treatment of cancer. Radiation therapy can be used to cure, care or shrink tumors that are interfering with quality of life. Sometimes radiation therapy is used alone; other times it is used in conjunction with chemotherapy and surgery.
Men who have undergone external beam radiation therapy may have a slightly higher risk of later developing colon cancer and bladder cancer. [34] Since prostate cancer is generally a multifocal disease, the traditional prostatectomy eliminates all local lesions by removing the entire prostate.
Lowering androgen levels or stopping them from getting into prostate cancer cells often makes prostate cancer shrink or grow more slowly for a time. However, this treatment needs to be combined with radiation therapy (RT) [8] because ADT itself does not eradicate the cancer; it just decreases its aggressiveness. [9]
Prostate cancer is the uncontrolled growth of cells in the prostate, a gland in the male reproductive system below the bladder.Abnormal growth of the prostate tissue is usually detected through screening tests, typically blood tests that check for prostate-specific antigen (PSA) levels.
With improved screening and early detection, he says, “many men with prostate cancer are diagnosed when the cancer is still contained, often allowing a cure through surgery or radiation.”