When I was diagnosed with acute lymphoblastic leukemia at 2 ½ years old, I never imagined it would ever come back. For leukemia survivors, your risk of relapse decreases significantly as years go by, all the way down to a less than 5% chance of relapse by ten years after your initial diagnosis. When that seemingly impossible occurrence became a reality for me, I was just about to turn 13. I could not believe it. Now that I have been through a cancer relapse, I feel that there is no number of years that will guarantee me safe from cancer.