Radiological Diagnosis of Depressed-Type Small Gastric Cancers Hirotaka Nakashima 1 , Ryuji Nagahama 1 , Yasuo Ohkura 2 , Toshifumi Yoshida 1 , Yasumasa Baba 1 , Akitoshi Miyamoto 1,2 , Rika Nakano 1 , Masakazu Maruyama 1 , Goro Yamaki 3 , Takahiko Kouda 4,5 , Masaaki Matsukawa 4 1Foundation for Detection of Early Gastric Carcinoma 2Department of Pathology, Kyorin University, School of Medicine 3Department of Gastroenterology, Kokoro to Karada no Genki Plaza 4Department of Internal Medicine, Showa University Toyosu Hospital 5Kouda Clinic Keyword: 小胃癌 , 陥凹型胃癌 , X線診断 , 背景粘膜 pp.753-762
Published Date 2006/4/25
DOI https://doi.org/10.11477/mf.1403100363
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We discussed radiological findings of depressed-type small gastric carcinomas. They were classified according to tissue form and background mucosa. The carcinomas targeted were 74 lesions, equal to or less than10mm but more than 5 mm in size.

 In well-differentiated type carcinomas, linear barium fleck was similar in 50.0 % of cases. In undifferentiated carcinomas,76.9 % showed irregularity of the depressed area,53.8 % showed fold abnormality, but there was poor visualization of the encroachment area image in 23.1%, so we needed to take special care when making marginal interpretation.

 The visualization rate of a lesion according to background mucosa showed that the f area was the best. In the f area(the shift zone between the fundic gland area and pyloric gland area), the radiological findings of depressive carcinomas were clear and easily expressed by double contrast method because elimination of fold and mucosal atrophy was not extensive in the background mucosa.

 Among carcinomas at the lesser curvature of the lower stomach body, or a pylorus ring neighborhood, there were many lesions expressed by a border image of the double contrast method or the pressing method. It seemed that a change of quantity of air and radiological en face view method were effective for X-ray examination of these lesions.

 There was a 29.2% ratio of multiple cancers and visualization of these using X-ray examination was insufficient.

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