抄録
This paper is to discuss the accuracy rate of direct vision biopsy, results of endscopic diagnosis and follow-up studies of atypical epithelium. The material consisted of 807 lesions in 621 cases encountered in our clinic from March, 1968 to May, 1971. Following conclusions were obtained: (1) In regard to the results in relation to the macroscopic types of cancer, depressed type of early carcinoma was somewhat difficult, with the accuracy rate being 95.2% in the type IIc, 88.8 % in the type IIc+III. All cases of the other types were correctly diagnosed. In advanced cancer of Borrmann type II, III, IV, the acouracy rates were 87.5%, 95.0%, 91.7% and those were lower than the mean accuracy rate. (2) There was no relationship between the size of specimens and diagnostic accuracy by gastric biopsy, but there was sonewhat relationship between the depth of specimens and diagnostic accuracy. (3) The histopathological pattern of cancer tissue obtained by biopsy was compared with that of surgi-cally resected specimen. Coincidence rate was 94.0% in differentiated carcinoma and 69.2 % in undif f ere-nciated carcinoma respectively. (4) In 401 cases which underwent biopsy with a tentative diagnosis of benign lesion, 12 cancer positive cases (2.9%) were experienced. (5) Biopsy is most effective in the differential diagnosis between IIa type early cancer and ATP. (6) With the use of measurement of gastric me-mbrane temperature at the same time, the accuracy rate of malignant lesion or border line lesion of stomach is improved.
