Precision of Routine Examination in the Gastric Carcinoma Mass Survey Yuji Yoshida 1 , Koichi Tamura 1 1Detection Center of Hokkaido Cancer Society pp.943-947
Published Date 1985/9/25
DOI https://doi.org/10.11477/mf.1403109777
  • Abstract
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 Although it has become possible to detect minute gastric carcinoma (2-3mm in diameter) due to rapid progress in the diagnosis of stomach cancer, namely by using radiography and endoscopy in close examinations, many cases of advanced carcinoma go unnoticed. The diagnostic accuracy of photofluorography in the gastric carcinoma mass survey, as well as future dimensions in accuracy improvement was considered.

 The total number of examinees in the gastric carcinoma mass survey program that was conducted by the Hokkaido Cancer Society during the period 1970-1982 was 1,644,658, of which 2,017 cases of gastric carcinoma were detected. False-negative rate (FNR) was estimated by using the “accidentally detected carcinoma” (ADC) method. The overall FNRs for this program was estimated at 29.7%, including 14.8 of x-ray “shadows-not-detected” and 10.4% of “readingfailure”. As a result of studies of carcinoma according to its affected region and size, many cases of “shadows-not-detected” and “reading failure” were found to have occurred at C,Post and Maj (Fig.5); many cases of “failure-not-detected” were found for minor lesions. An improvement in photograph, which can clearly depict lesions, as well as careful re-reading which prevents reading failure, are of great necessity.

Copyright © 1985, Igaku-Shoin Ltd. All rights reserved.


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