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Histological Diagnosis of Serrated Polyp of the Colon Hiroyuki Mitomi 1,2 , Hiroki Tanaka 1 , Hidetsugu Yamagishi 3 , Seiji Igarashi 4 , Kaoru Hirabayashi 4 , Yasuo Okura 5 , Shinichi Ban 6 , Mitsuya Iwafuchi 7 , Tomio Arai 8 , Ryoji Kushima 9 , Hiroshi Kawachi 10 , Ryo Wada 11 , Takashi Yao 2 1Department of Pathology, Japan Labor Health and Welfare Organization, Kanto Rosai Hospital, Kawasaki, Japan 2Department of Human Pathology, Juntendo University School of Medicine, Tokyo 3Department of Pathology, Dokkyo Medical University School of Medicine, Mibu, Japan 4Division of Pathology, Tochigi Cancer Center, Utsunomiya, Japan 5Department of Pathology, Kyorin University School of Medicine, Mitaka, Japan 6Department of Pathology, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Japan 7Department of Medical Technology, School of Health Sciences, Faculty of Medicine, Niigata University, Niigata, Japan 8Department of Pathology, Tokyo Metropolitan Geriatric Hospital, Tokyo 9Department of Clinical Laboratory Medicine, Shiga University of Medical Science, Otsu, Japan 10Division of Pathology, The Cancer Institute Hospital of Japanese Foundation of Cancer Research, Tokyo 11Division of Diagnostic Pathology, Juntendo University, Shizuoka Hospital, Izunokuni, Japan Keyword: 無茎性鋸歯状腺腫/ポリープ , 組織診断 , 古典的鋸歯状腺腫 , BRAF遺伝子変異 , 免疫組織化学染色 pp.1636-1647
Published Date 2015/12/25
DOI https://doi.org/10.11477/mf.1403200488
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 According to the latest WHO classification, the family of serrated polyps comprises hyperplastic polyps, SSA/Ps(sessile serrated adenomas/polyps), and TSAs(traditional serrated adenomas). However, discordance is present among pathologists regarding the morphologic diagnosis of serrated polyps. The accurate diagnosis of serrated polyps is crucial for a better understanding of accurate risk and adequate surveillance approaches for malignant neoplasia and also for the better understanding of the molecular data that were created on the“serrated neoplasia”pathway. We evaluated concordance in the morphologic diagnosis of 12 serrated polyps among 9 pathologists with a special interest in gastrointestinal pathology. We found that the agreement between pathologists for right-sided SSA/P was relatively high and that their diagnoses relied on observing dilatation of crypts, branched crypts, horizontal crypts, and serrated architecture starting in basilar crypt regions. Left-sided pedunculated-type SSA/Ps were often diagnosed as TSA. Detection of BRAF mutation by immunohistochemistry(with the monoclonal antibody, VE1)is a feasible technique in the routine pathologic diagnosis of serrated polyps, especially TSA.


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電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院

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