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Question
What is the incidence of missing a polyp via sigmoidoscopy that was found 2 years later to be under a fold, 15 cm from the anal verge? Is this common or was the procedure done ineffetively?
Janet,
The question of the incidence of missing a polyp is an interesting one. I don't know of any studies that have determined this and my guess is that this isbecause there is no other "gold standard" to compare sigmoidoscopy with.
An educated guess would be that it would be possible for a polyp too small to be seen two years ago could grow in size enough in 2 years to be seen. In any event, removing the polyp removes the risk of cancer from that polyp.
John W. Cromwell, M.D.
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Questioner's Rating
| Rating(1-10) | Knowledgeability = 10 | Clarity of Response = 10 | Politeness = 10 |
| Comment | Because this is such a stressful problem, I am so grateful for the VERY prompt response! I will have it checked out, but glad to see Cancer wasn't the most probable possibility! Thank you very much! | ||
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John C. M.D.
Expertise
I can answer questions regarding molecular biology, risk factors, and other aspects of colon and rectal cancer. I will only be able to answer questions regarding chemotherapy and radiation therapy in general terms.
Experience
Extensive research in molecular biology and clinical aspects of colon cancer at the University of Minnesota Cancer Center
Publications
Surgical Forum
Seminars in Colon & Rectal Surgery
Diseases of the Colon and Rectum (in publication)
Education/Credentials
M.D. University of Minnesota 1994
Clinical Research Fellow, University of Minnesota Cancer Center 1996-1999
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