All I can say is Wow! 26 years and counting. I think this makes you the Dean of our Discussion Board. I hope we can hear from you from time to time. It certainly is nice to have you with us.
I had not yet encountered anyone treated with interferon, and looked it up. I found some medical articles about using interferon for cholangiocarcinoma published in the mid-1990s, which would have been around the time you were treated. Have you communicated back to your original doctors that you have done so well?
So pleased to meet you, take care, Mary