It starts with Telma, a plucky adolescent who’s not only the youngest breast-cancer survivor ever, but quite possibly the most ambitious. She is unceasingly cheerful, a supportive force on the ward, a favorite of her doctors and nurses, and writes “kancer” with a “k” as a way of taking away its power. She has taken her cancer fame as far as it can go, performing at celebrity fundraisers with the likes of Michael Douglas and Beyonce, but she wants more