Tubulovillous adenoma question

Summer91

All, in 2019, my gastroenterologist removed a 2cm flat polyp from rectum that was classified as a Tubulovillous adenoma. I know this is a benign polyp but does have a 20% -40% chance of becoming malignant (different % depending on sources). Due to the pandemic and life issues, I did not have another colonoscopy until last week. Another polyp was discovered directly adjacent to the site of the removed polyp but was more tubular than flat. The gastroenterologist said he did not feel comfortable removing it because of the scar tissue. He did a biopsy and the pathology report again classifies the polyp as Tubulovillous adenoma. He says it needs to be surgically removed. Has anyone had this surgery? Any problems or adverse effects? Thanks!

Summer91

Follow up - the gastroenterologist is directing me to another doctor who specializes in transanal endoscopic surgery. This seems like major overkill for a benign tumor that he could have removed during the colonoscopy but he was too busy fussing at me for waiting so long between colonoscopies and at himself for possibly not removing all of the polyp in 2019. Hard to get a word in and, yes, I do not do sedation. From what I have read of TEM, there are many possible adverse effects. Anyone experienced TEM?