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Evaluation of Gastric Mass Survey from the Point of View of the Prevalence of Gastric Cancer among Seemingly Healthy Individuals Toshiaki Shiga 1 1Tokyo Metropolitan Cancer Detection Center Keyword: 胃集検 , 胃癌 , 有病率 pp.1371-1385
Published Date 1991/12/25
DOI https://doi.org/10.11477/mf.1403102716
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 The currently employed indirect x-ray examination was evaluated by determining what kind of cancer was detected or elusive among 17,976 randomly selected gastric mass survey participants, aged 50 years or older, who underwent small diameter panendoscopic examination.

 1) 93% of advanced gastric cancer cases detected by small diameter panendoscopy, which had also been detected by indirect x-ray examination. Thus, indirect x-ray examination was concluded extremely effective, especially when early-like advanced cancers on the anterior wall or in the high position were excluded.

 2) 39% of early cancer cases were detected by indirect x-ray examination, with 44% for elevated type and 36% for depressed type. Early cancers of the anterior wall or in the high position, and those less than 2 cm in diameter tended to be elusive by indirect x-ray examination.

 3) Small diameter panendoscopy successfully detected gastric cancer among healthy people aged 50 years or older, with 2.03% (1.43% for early cancer) for men and 1.05% (0.8% for early cancer) for women. When visit rate for further examination was assumed to be 100%, nationwide gastric cancer detection rate was calculated to be 0.47% (0.23% for early cancer) for men and 0.15% (0.07% for early cancer) for women, indicating that significant number of seemingly healthy individuals had in fact early cancer which could not be detected by indirect x-ray examination.


Copyright © 1991, Igaku-Shoin Ltd. All rights reserved.

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

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