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.

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.