Colonoscopic Diagnosis of Serrated Adenoma Takayuki Matsumoto 1 , Mitsuo Iida 1 1Division of Gastroenterology, Department of Medicine, Kawasaki Medical School Keyword: 大腸腺腫 , 鋸歯状腺腫 , 大腸内視鏡 , 大腸癌 , 過形成ポリープ pp.879-890
Published Date 1998/5/25
DOI https://doi.org/10.11477/mf.1403103729
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 The aim of this study was to clarify colonoscopic features of serrated adenomas. Endoscopic findings of 53 serrated adenomas of the colorectum were investigated with respect to location, configuration and histologic findings. The serrated adenomas were located predominantly in the distal portion of the colorectum, and they frequently manifested pedunculated or semi-pedunculated configuration. Their surface features determined under colonoscopy could be divided into either hyperplastic pattern, cerebriform pattern or mixed pattern. Tubular type of serrated adenoma was predominant in the hyperplastic pattern, while tubulovillous or villous type of adenoma was frequent in the cerebriform pattern and in the mixed pattern. High grade dysplasia was found in three of 11 lesions with mixed pattern, while it was found in one of 11 lesions with hyperplastic pattern and in none of eight lesions with cerebriform pattern. These findings suggest that 1) surface features in serrated adenoma have close correlation with their histologic type, and 2) they provide important information for endoscopic diagnosis of this type of colorectal neoplasia.

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