Many types of cancers are merely bad luck, study shows

Rather than being caused by lifestyle choices, many cancers are merely the result of freak mutations, says a new US study. Could it be that early prevention is the only way to fight many cancers that are caused, researchers say, by random mutations? A new study, published in this month's issue of Science magazine , offers the painful conclusion that lifestyle factors -- often these attributed as a cause of many cancers -- only account for around one-third of cases.

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