Cancer risks cascade through generations for some families. But there are high hopes for precision medicine - ABC News

In the past few decades, many hereditary mutations have been discovered that put people at risk of cancer. Doctors are now racing to identify ways to stop the onset of these cancers.

Michelle Brady remembers how much her daughter Addie loved life. Key points:

• Addie Brady was diagnosed with cancer at age 9 and age 14
• Genetic testing revealed she had an inherited … [+7231 chars]
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