At the age of twenty, I was told that I had a fifty percent chance of having inherited a cancer-causing genetic mutation. A fifty percent chance is a bit like an imaginary illness. So I began to share my life with a virtual creature. In my family, I explore the personal myths we create in the face of predictive medicine that is still in its infancy. The mystery that these sciences seek to shed a light on and the probability of fatal disease often bring me back to the same question: to believe or to know?
