I am a 15 year old boy, and just over a year ago I noticed a medium sized lump on the front of my left testicle, and didn’t take any notice of it. I am aware and concerned now that it could be testicular cancer, and I have an appointment to see my GP tomorrow. I know that testicular cancer has a very high survival rate; however, I am concerned that if it is cancer, then I have left it too late, and it will be much more severe? If it is cancer, have I left it too late?