Step section histology of proximal colon polyps that appear hyperplastic by endoscopy.
OBJECTIVE
Recent studies have identified a group of polyps, usually located in the proximal colon, with distinct endoscopic features that predict hyperplastic histology. These polyps may occasionally have foci of dysplastic (adenomatous) tissue. We aimed to define the prevalence of adenomatous foci in these polyps.


METHODS
Fifty-one consecutive hyperplastic-appearing proximal colon polyps were sectioned at 1-mm intervals for histological analysis.


RESULTS
All 51 polyps were hyperplastic, but two (4%) had foci of adenomatous tissue.


CONCLUSIONS
The prevalence of adenomatous foci in proximal colon polyps with endoscopic features of hyperplastic polyps is low. Whether endoscopic resection of polyps with these features is warranted remains uncertain.
Rex
Douglas K
DK
Department of Medicine, Indiana University, Indianapolis 46202, USA.
Ulbright
Thomas M
TM
D000236:Adenoma / Q000473:pathology*; D011125:Adenomatous Polyposis Coli / Q000473:pathology; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003111:Colonic Polyps / Q000473:pathology*; D003113:Colonoscopy; D005260:Female; D006801:Humans; D006965:Hyperplasia; D008875:Middle Aged