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Cancer-describe the life style disease/ behaviour and explain the factor that contribute to the disease
Determining what causes cancer is complex. [ Many things are known to increase the risk of cancer, including tobacco use, certain infections, radiation, lack of physical activity, poor diet and obesity, and environmental pollutants.[1] These can directly damage genes or combine with existing genetic faults within cells to cause the disease.[2] Approximately five to ten percent of cancers are entirely hereditary. Cancer can be detected in a number of ways, including the presence of certain signs and symptoms, screening tests, or medical imaging. Once a possible cancer is detected it is
diagnosed by microscopic examination of a tissue sample. Diet, physical inactivity, and obesity are related to approximately 30–35% of cancer deaths.[1][19] In the United States excess body weight is associated with the development of many types of cancer and is a factor in 14–20% of all cancer deaths.[19] Physical inactivity is believed to contribute to cancer risk not only through its effect on body weight but also through negative effects on immune system and endocrine system.[19] Diets that are low in vegetables, fruits and whole grains, and high in processed or red meats are linked with a number of cancers.[19] A high salt diet is linked to gastric cancer, aflatoxin B1, a frequent food contaminate, with liver cancer, and Betel nut chewing with oral cancer.[20] This may partly explain differences in cancer incidence in different countries for example gastric cancer is more common in Japan with its high salt diet[21] and colon cancer is more common in the United States. Immigrants develop the risk of their new country, often within one generation, suggesting a substantial link between diet and cancer.[Poor diet, tobacco, air and water pollution, alcohol and radiation all may contribute to cancer. ]
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Expert answered|selymi|Points 7952|
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Asked 4/15/2012 5:43:12 AM
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