Bert,
What some people call 2nd opinion, I call getting to the specialist.
Once bladder cancer is diagnosed, it is wise to then get to a top bladder cancer specialist. They tend to be with the major teaching hospitals and Pat suggested one that is in your general area.
While a general practitioner has a broad understanding of many things, he/she will typically refer you to a specialist once he/she comes to the conclusion that it isn't something common and requires a specialist (such as a urologist) to treat.
Likewise, a urologist has a deeper understanding and experience than the general practitioner in urological related diseases and conditions, once bladder cancer is diagnosed, it is a good idea to have the stage/grade/and treatment options evaluated by the top bladder cancer specialist. Since these specialists focus on bladder cancer, they do more surgery, and have more expertise than most local urologists.
Some folks call that getting a 2nd opinion (when you get to the bladder cancer specialist). If he/she agrees with you local urologist on the diagnosis (stage and grade a critically important) and on the treatment, then it may make sense to have the local urologist do the treatment. This is often the case when BCG treatments are required but not the case if surgery is required.
It is recommended that even the 2nd TURB be done at a top bladder cancer hospital with a bladder cancer specialist. Again, they do more of them so they are better at it.
Bladder cancer is significantly understaged, which is another reason to have the best specialist you can.
This is nothing against your specific urologist or local urologists in general. It is based repeated research into the outcomes of patients treated at the top hospitals with the top bladder cancer experts versus those who are not.
Hope that helps explain things a bit.
Mike