I have to agree that I don't have much faith in biologics. I tried them because I felt that they could help and was okay with the risks, but they did nothing. They do work great for some people, but it seems to me that many cases just don't respond to anything. That's why we have to have surgical options.
Don't be embarrassed about going to the surgeon! I'm sure they have patients like you all the time. If your whole colon is not affected, I'm not sure I'd get rid of it but see what they saw, as I'm no surgeon!