Here is a list of the country's top cancer centers. This should help you if you choose to look into a second opinion. A second opinion means going to a completely separate hospital, one that is not affiliated with the one you currently have gotten your opinion and treatment plan from.

NCI Cancer Centers

I know it may not be convenient but some patients will travel to get the very best medical care from the country's top doctors and cancer centers. There are even airlines which will give discounted or free flights. Several major cancer centers have special facilities nearby for patients to stay for free or very low cost (like $5 or $10 a day). So dont rule out places like MD Anderson (TX), Sloan Kettering (NY) or Johns Hopkins (MD) just because of distance. Think of it this way, you may have only one shot at getting rid of the cancer so you would want to pick the most experienced team who can provide you with the best medical care.