A CLINICOPATHOLOGICAL STUDY ON THE FLAT AND DEPRESSED TYPE ADENOMA OF THE STOMACH

概要

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We investigated a clinicopathological study to know the feature of flat and depressed type gastric adenomas in 31 cases. These 31 lesions included 13 flat type in 13 cases and 18 depressed type in 18 cases. Fifteen lesions (83.3%) of the depressed type adenoma were detected by endoscopic examination. In endoscopic findings, depressed type adenoma was observed as slight redness with the unclear demarcation surrounded by relatively rough and large nodules. The base of the depressed area was flat, and the marginal swelling was smooth. On the other hand, only one lesion (7.7%) of the flat type adenoma was detected by endoscopic examination. According to the results, the flat type adenoma may have little change in the tone of color endoscopically. All of 31 cases were found in the pyloric gland area. The mean maximum diameter of the lesion was 5.1 ± 6.6 mm in flat type, which was significantly smaller than 11.4 ± 5.6 mm in the depressed type and 9.7 ± 1.2 mm in cases associated with carcinoma in adenoma. Cystic dilatation of atypical epithelial tubules in deep layer of adenoma was small and diffuse development in flat type. However, in the depressed type adenoma, they tended to be large, existing in the marginal area. Therefore, based on results, it could be sugested that depressed type adenoma devel-oped from caving of flat type from the view point of growing form.
社団法人日本消化器内視鏡学会の論文