Journal
PATHOLOGY INTERNATIONAL
Volume 51, Issue 3, Pages 215-220Publisher
BLACKWELL SCIENCE ASIA
DOI: 10.1046/j.1440-1827.2001.01177.x
Keywords
adenocarcinoma; colon and rectum; hyperplastic polyp; serrated adenoma
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We present a case of intra-epithelial carcinoma occurring in a serrated adenoma of the colon. The pedunculated polyp, which measured 12 x 10 x 6 mm, was endoscopically removed from the ascending colon of a 78-year-old woman. Histologically, the polyp mainly consisted of serrated adenomatous glands, and had foci of intra-epithelial carcinoma at the top. Hyperplastic (metaplastic) areas were also present in both borders between the serrated adenomatous area and the surrounding normal mucosa. A sequential increase in the degree of dysplasia, and in the number of nuclei positively reactive for Ki-67 and p53 was evident from the hyperplastic areas toward the foci of carcinoma. The polyp described here may represent a carcinogenic potential of hyperplastic polyp via serrated adenoma.
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