Welcome to OCF Carol!
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From what you wrote, I would highly recommend taking him to a large CCC. Luckily you have a major CCC right in your state, Moffitt is one of the best. Where you go really does matter! Especially if the case is complicated. You will want top doctors who have the most experience treating hundreds of similar BOT cancers. I see others have mentioned this to you so I will provide the CCC list in case you want to look further.
List of Cancer Centers Best wishes!