Can prostate cancer be prevented?

Principal investigator Ian Thompson, M.D., sorts out the Prostate Cancer Prevention Trial's findings and outlines finasteride's risks and benefits

For men diagnosed with prostate cancer, the question of what to do next is probably foremost in their minds. Surgery? Radiation? Wait to see how quickly the tumor grows? But somewhere in the midst of all the soul-searching, many inevitably wonder, "Is there anything I could have done to prevent prostate cancer in the first place?"