This isn't a great example, because testicular cancer is rarely fatal. http://en.wikipedia.org/wiki/Testicular_cancer
> Testicular cancer has one of the highest cure rates of all cancers: a five-year survival rate in excess of 90 percent overall, and almost 100 percent if it has not spread (metastasized).[6] Even for the relatively few cases in which malignant cancer has spread widely, modern chemotherapy offers a cure rate of at least 80%.[7]
Obviously, awareness still helps. (And openness. I had an ultrasound when I was 16 (turned out to be a hydrocele), but I think it was a few weeks from when I noticed the lumy to when I told my mum about it, because how do you bring something like that up?)