Lecture 10 Cancer causes and risk factors environmental Environment has 90 95 role in cancer development while genes only have 5 10 Cancer causes and risk factors Age Oncogenic viruses Heredity Environmental agents workplace chemicals exposure Lifestyle factors tobacco use alcohol use diet food Radiation Environment vs heredity Study of ppl that move from 1 country to another Heredity stays the same environment changes Opposite is true in the USA Stomach cancer high colon cancer low in Japan Japanese immigrants move to US differences begin to disappear children of immigrants acquire cancer risks of new location Thus environment plays a later role than heredity Mutagenic able to cause a mutation Carcinogenic able to cause cancer Diet and cancer risk Foods contain carcinogens and anti carcinogens Anti carcinogens in fruits my block carcinogens Epidemiologists estimate that diet plays a role in 30 of all fatal cancers
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