colonoscopy pain and missing polyp

I've had 3 colonoscopies due to a history of polyps, IBS, and also family history of colon cancer amd ulcerative colitis.  My first 2 colonoscopies 3 yrs apart were totally painless and polyps were removed (non cancerous.)  The medical notes from my colonoscopy 3 yrs ago said that 2 polyps were removed but one could not be retrieved.  The last colonoscopy I had was excruciatingly painful AND the dr. said it was normal. My question is what could possibly have happened to the polyp from 3 years ago.  Do they ever disappear?  I did have to sign a waiver that there is a possibility that polyps, cancer, etc. could be missed.  Could the pain have been from an inflammed intestine?

[Ratnakar Kini, MD]

Hi Merla,
Unlike the upper GI endoscopy, colonoscopy is a very difficult procedure for both the patient and the performing doctor.
Pain or discomfort can occur due to technical reasons.
Since there are lot of folds and blind spots inside, the chances of missing a lesion (polyp) are always there.
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The information provided is for patients’ education only and is not a medical advice. Always consult your personal physician for complete evaluation of your health problem.

- Ratnakar Kini M.D.