For about a year now i have had one small yellow/whiteish bump on my left testicle. It's not only on the surface of my scrotum but i can feel it on the testicle itself. There is no hair coming out of it. I did however, go to the doctor to get my physical a few months ago, it's the same size it was back then. The doctor didn't say anything about it. I'm just worried about it being cancerous.