Dodging Cancer; genetic testing. Does "cancer run in the family"?

Do the benefits of genetic testing outweigh the costs and when should it be done?
How important is genetic history in determining cancer risk?
Discussing the relative rates of hereditary, versus replicative or environmental risk-factors for cancer.
Tomasetti, Vogelstein stochastic model of cancer incidence (cover photo).
We discuss the shock of getting a cancer diagnosis, the Kubler Ross phases between denial and ultimate acceptance. How does one navigate the diagnosis on the way to proper, efficient, efficacious, and timely therapy?