Are you sure the sonogram was ordered for your stomach and not your testicles? It doesn t make sense that both a sonogram and MRI were ordered for your stomach. Ultrasounds are often done if there is a problem with the testicles. This would be the ideal test for enlarged gonads. In any case, the person specializing in problems with gonads is a urologist. If this is related to a hernia (I am trying to figure out how the stomach bloating and enlarged gonads are related), a urologist is also a surgeon who can repair it. Sometimes cysts in the spermatic cords can cause testicular enlargement. The urologist can examine you and make a judgment about what is going on, but I am pretty certain will also order a sonogram. Hope this helps.