There are over 10 million cancer survivors in this country. Ten million of us who go about our lives with a shadow in our souls. For some of us, it’s the merest wisp of silver, a hint of mist on a cool, early spring morning. For others, the shadow is darker than the darkest night, more threatening than a bank of black thunderheads rolling across the August sky. Where’s the cancer? Is it gone? Is it hiding? And, sometimes… is it back?

Day after day, I live comfortably with the fact that I...