one of my testicals is quite abit smaller than the other, Ii understand it is natural to have one smaller but I can tell the right testical has shruk, I exam myself often as recomended and over the past 4 or 5 years itr has become more noticable. The Dr. says my testosterone level is low but not enough for supliments. What beside low T or cancer can cause this and is it common in older men. I am over 55