Hello, I am 18 and have several small, hard lumps on both testicles. I noticed this a few years back, but didn't think much of it. Since then there have been more forming. I have looked up some of the descriptors of testicular cancer lumps (as I am uninformed on things like this), and they seem to match perfectly. Varying sizes, like hard rubber, and not normal. Could this be cancer, or what else could this be?