However, I have a hunch that frequent colonoscopies are maybe not a good idea.
Doubts:
1. We know more but we don't know all things creating colon cancer. Knowing the existence of cancers caused by viruses, disinfection procedures applied on the device could matter a lot.
2. Even if we disinfect properly, we know of a notorious little fellow: H.pylori, which can go down to the intestines. "Helicobacter pylori infection is associated with colon adenomatous polyps detected by high-resolution colonoscopy." https://bmcgastroenterol.biomedcentral.com/articles/10.1186/...
3. H. pylori (which serves just as an example, there can be other bad guys) is really hard to get rid of with disinfectants. It builds up resistance over time so it's doubtful that our disinfectants currently in use will stay as effective as well.
4. Frequently putting a foreign object to different people's colons (yes, I know it's disinfected) would increase the probability of transmitting such unknown risks.
I didn't talk about perforation risk. Just the possibly transmissible cancer risk.
So I remain doubtful that it's completely harmless It's necessary but every year? Doubtful without more data.
Finally, thanks for the people who invented and use it to save lives. I wanted to share my doubts on frequent colonoscopies