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Molecular Biological Characteristics of Early Stomach Adenocarcinomas of the Completely Gastric Phenotype Revealed by Laser Capture Microdissection and Comparative Genomic Hybridization Ryoji Kushima 1 , Ken-ichi Mukaisho 2 , Shizuki Tsukashita 2 , Dun-Fa Peng 2 , Michael Vieth 3 , Manfred Stolte 3 1Division of Diagnostic Pathology, Shiga University of Medical Science 2Department of Pathology, Shiga University of Medical Science 3Institute of Pathology, Klinikum Bayreuth, Germany Keyword: 胃型高分化型癌 , 胃型腺癌 , microdissection , CGH , 染色体異常 , 幽門腺型腺腫 pp.707-721
Published Date 2003/4/25
DOI https://doi.org/10.11477/mf.1403100864

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 Gastric-type adenocarcinomas are often difficult to diagnose by histopathological and endoscopical examination, but their biological and clinical behavior has been suspected of being potentially highly malignant. We examined chromosomal abnormalities in 13 cases of early well-differentiated gastric adenocarcinomas of the completely gastric phenotype by means of laser capture microdissection and comparative genome hybridization. Most cases showed low-grade nuclear atypia. Gains of 1p36-pter, 9q34-qter, 17p12-pter, 17q24-qter, 20pq, 22q, losses of 6q, 18q, and amplification of 15q26 were frequently and commonly detected. Adenocarcinomas arising in a hyperplastic polyp and a pyloric-gland type adenoma displayed the same tendency. In spite of low-grade histopathological atypia, gastric-type adenocarcinomas, even in the early stage, were shown to harbor considerable chromosomal abnormalities as has been previously reported in advanced gastric carcinomas and cancer cell lines. In addition,“pyloric-gland type adenoma-gastric type adenocarcinoma sequence” was first detected from points of the phenotypic expression and chromosomal abnormality.


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

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