Hi, I'm sorry to hear about your dad's diagnoses. You asked, how long your dad has, I don't think anyone could answer that question. I know how devastating you must be, seeing what your dad is going through at the moment. I had bladder cancer, high grade, muscle invasive, it's over three years now, and I'm still here. My wife had lymph node metastasis six years ago, she's fine now. I'm sure your dad has a long way to go, and of course your worried about his outcome. The best advise I can give you, is, write down all your questions concerning your dad's health, then take that list to your dad's specialist. That way you won't forget to ask his doctor questions on matters that are worrying you. Don't be afraid to ask questions, doctors expect you to. Let me know how you go, Wazza