exactly 3 weeks ago, i noticed a lump on my scrotum(on the right side near the end of the scrotum). it was as if it had appeared overnight (i didnt notice it the day before, and i'm down there quite often). it was originally the size of 3 or 4 grains of rice, now it is about the size of one. i am 17 years old, dont smoke, dont drink, and havent had sex. i know that this is most likley something harmless, but is there a chance this could be scrotal cancer?