He clipped the blood supply to it. It grew back. The doctor said this surprized him but that he would remove the entire vessel. My son declares that it is back and the doctor said there is no way it could be. My son says it is as big as ever and hurts.
Varicoceles are varicose veins draining the testicle.
They are more common on the left and if causing discomfort usually do so when upright or straining. They can recur following surgery as there are several interconnections between the veins draining the testes. I have not heard varicoceles described as a lump before. I think that your son should be examined by a urologist within the next week. There are several possibilities the most serious of which is a cancer.