Hi my son is 21 and has a mass in his left testicle that occurred when on a 1000 mile bike ride and came on over about 1 week. ultrasound showed well circumscribed mass 1.6 x 1.4 x 2.4 cm which continued to diminish until it is 8mm now. we have the opportunity to have a cat scan done and I want to know what this will show about the tumor not just the node spread. will it show torsion, hernia or infection? I feel it is useful and time is of the essence as he has already waited 6 months. 7 ultrasounds later the spot is stationery at its current size.