50% of familial breast cancer cases cannot be explained by what we currently know about genetic risk. In a new study, researchers identify non-genetic, but heritable, epigentic marks which modulate disease risk. Suggests a role for heritable environmental influence on cancer risk.

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50% of familial breast cancer cases cannot be explained by what we currently know about genetic risk. In a new study, researchers identify non-genetic, but heritable, epigentic marks which modulate disease risk. Suggests a role for heritable environmental influence on cancer risk.