36511 - Risk Factors For Cancer By Salwa Hassan Teama...

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Risk Factors For Cancer By Salwa Hassan Teama
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Contents Cancer Cancer Cancer as a Global Health Problem Cancer as a Global Health Problem Cancer As a Genetic Disease Cancer As a Genetic Disease Risk Factor Risk Factor Risk Factors For Cancer Risk Factors For Cancer Avoidable Cancer Risk Avoidable Cancer Risk Primary Prevention Primary Prevention Early detection Early detection G G enetic testing enetic testing
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Cancer Cancer is one of the most common and severe problems of clinical medicine. Cancer is not a single disease but rather a name applied to a great variety of malignant tumor that are formed by the same basic process of uncontrolled growth. Cancer has emerged as a major public health problem in developing countries for the first time, matching its effect in industrialized nations. This is a global problem.
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Cancer begins in Cancer begins in cells cells , , the building blocks that the building blocks that form form tissues tissues . Normally, cells grow and divide to form new Normally, cells grow and divide to form new cells as the body needs them. When cells grow cells as the body needs them. When cells grow old, they die, and new cells take their place. old, they die, and new cells take their place. Sometimes, this orderly process goes wrong. Sometimes, this orderly process goes wrong. New cells form when the body does not need New cells form when the body does not need them, and old cells do not die. These extra cells them, and old cells do not die. These extra cells can form a mass of tissue called a growth or can form a mass of tissue called a growth or tumor tumor .
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Cancer Cell proliferation results in a mass (neoplasm or tumor) that invade neighboring tissues and may metastasize to more distant sites. The growth is autonomous, increasingly malignant, and if left untreated, invariably fatal. Benign tumors which are: Self-limited in their growth Do not invade or metastasize (although some benign tumor types are capable of becoming malignant). Malignant neoplasm or tumor (cancer) : group of cells display Excessive growth and divi sion without respect to normal limit. Invasive, invade and destroy adjacent tissues , and sometimes Distant metastasis spread to other locations in the body . Early diagnosis and early treatment are vital, and identification of persons at increased risk of cancer before its development is an important objective of cancer research.
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Cancer The etiology of cancer is multifactorial , with genetic, environmental, medical, and lifestyle factors interacting to produce a given malignancy. Knowledge of cancer genetics is rapidly improving our understanding of cancer biology, helping to identify at-risk individuals, this expanding knowledge base has implications for all aspects of cancer management, including prevention, screening, and treatment.
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It is now believed that cancer is caused by genetic mutations ; most often, by a series of mutations, some of which may be inherited.
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