KMID : 0988920120100030295
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Intestinal Research 2012 Volume.10 No. 3 p.295 ~ p.299
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A Case of Mixed Hyperplastic-adenomatous Rectal Polyp with Composition of Invasive Adenocarcinoma
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Seo Hyo-Rim
Kim Ji-Hyun Jung Soo-Jin Choi Youn-Jung Ryu Chung-Heon Park Kwan-Sik Ha Seung-In Jung Eun-Uk Lee Sang-Heon Park Sung-Jae Choi Jung-Sik Jee Sam-Ryong Lee Youn-Jae Seol Sang-Young
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Abstract
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Epithelial colon polyps are largely divided into hyperplastic and adenomatous polyps. Adenomatous polyps are premalignant lesions, whereas hyperplastic polyps are regarded as benign lesions. However, this histological classification has been blurred, as cases of malignant changes in hyperplastic polyposis, mixed hyperplastic adenomatous polyps (MHAPs), and serrated adenomas in the colon have been reported. Rare cases of MHAP have been reported, and are mainly found at the proximal colon with a relatively large size. MHAPs seem to be an intermediate stage of the hyperplastic polyp-adenoma sequence or a collision tumor. Here, we report on a case of a single polyp in the rectum diagnosed with a MHAP combined with an invasive adenocarcinoma.
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KEYWORD
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Hyperplastic polyp, Invasive adenocarcinoma, Rectum
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