What percentage of all cancers are hereditary?

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Multiple Choice

What percentage of all cancers are hereditary?

Explanation:
Hereditary cancers are a minority of all cancers. Most cancers arise from somatic mutations acquired during life, while inherited germline mutations that dramatically increase risk account for only a small portion of cases. Across all cancer types, roughly five to ten percent are due to these inherited variants. This estimate reflects how family history and genetic testing are powerful for identifying risk and guiding prevention, but also why the majority of cancers occur without an inherited predisposition. Rates like one to two percent underestimate the contribution of inherited risk, while higher ranges such as fifteen to thirty percent overstate it.

Hereditary cancers are a minority of all cancers. Most cancers arise from somatic mutations acquired during life, while inherited germline mutations that dramatically increase risk account for only a small portion of cases. Across all cancer types, roughly five to ten percent are due to these inherited variants. This estimate reflects how family history and genetic testing are powerful for identifying risk and guiding prevention, but also why the majority of cancers occur without an inherited predisposition. Rates like one to two percent underestimate the contribution of inherited risk, while higher ranges such as fifteen to thirty percent overstate it.

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