That is so interesting. I just had a colonoscopy at Mayo and the GI besides removing polyps also noted that mucous was granular so he took biopsies throughout the entire colon for possible microscopic colitis. Fortunately I was negative for it.
And what I now tell everyone is that even if you are near "aging out" from colonoscopies, do them!!! In 2010 I had 2 10mm precancerous polyps, but in 2013 and 2018 I only had 1 and 2 polyps found and they were not precancerous. So that period was eight years and no cancerous polyps.
Then in 2024 - 14 years from 2010 and 5+ years from last colonoscopy, they find 3 polyps - each a different type and all precancerous!!! And one even 12mm!!!

Am also impressed that Bactrim caused you C-diff as I have been given it more than once with the statement that it is relatively safe.