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Journal of Ultrasound in Medicine, Vol 17, Issue 4 207-211, Copyright © 1998 by American Institute of Ultrasound in Medicine

JOURNAL ARTICLE

Gallbladder polyps: prospective study

J. A. Collett, R. B. Allan, R. J. Chisholm, I. R. Wilson, M. J. Burt and B. A. Chapman
Department of Gastroenterology, Christchurch Hospital, New Zealand.

The aim of this study was to describe the natural history of gallbladder polyps. Thirty-eight subjects who had been previously identified as having gallbladder polyps in an epidemiologic study of gallstone prevalence in 627 diabetic subjects and matched controls were followed longitudinally. Follow-up sonograms were obtained on 33 and 22 of the 38 subjects at 2 and 5 years, respectively. Prevalence for gallbladder polyps in this population was 6.7%, with a marked male predominance (odds ratio 2.3). No statistical difference in prevalence was found between diabetic subjects and nondiabetic controls. Ninety percent of the polyps were less than 10 mm in diameter, with no polyp being larger than 12 mm. During the follow-up period no changes suggestive of malignant transformation were observed. In conclusion, we found that gallbladder polyps were relatively common and that few significant changes occurred over a 5 year period. In asymptomatic subjects in whom gallbladder polyps less than 10 mm in diameter are found incidentally, the likelihood of malignant transformation is low.


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Am. J. Roentgenol., August 1, 2001; 177 (2): 467 - 467.
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