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논문 기본 정보

자료유형
학술저널
저자정보
조대현 (카톨릭대학 의학부 부속 강남성모병원 방사선과)
저널정보
대한영상의학회 대한방사선의학회지 대한방사선의학회지 제19권 제1호
발행연도
1983.1
수록면
161 - 167 (7page)

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Ultrasonography is a simple, noninvasive and relatively accurate method to differentiate carcinomas from stones in the extrahepatic biliary tree. We analysed ultrasonic findings in 18 stone cases and 10 carcinoma cases of the extrahepatic biliary tree, which were confirmed by microscopic examination or percutaneous transhepatic cholangiography during the period of May 1980 through May 1982 in Kang-nam St. Mary's Hospital. The results were as follows : 1. The number of incidences of multiple echogenecities was 11 out of the 18 stone cases (61.1%) but there were no incidences of multiple echogenecities among the carcinoma cases. Eight cases, four of stones and carcinomas each, were not detected by sonography. 2. The average diameter of the stones was below 20mm in 13 of the 18 cases (72.2%) and the number of the stones over 20mm in diameter was only one of the 18 (5.6%), while the number of carcinomas over 20mm was three of the 10 cases (30%). 3. In the 18 patients with stones, the degree of echogenecity was uniformly high in seven (38.9%) and mixed-moderate in seven (38.9%). All the carcinomas, however, presented mixed-slight echogenecity. The marginal sharpness was well defined in nine of the 18 stone cases (50%), but only one among the carcinomas. 4. The obstructive site in the biliary tree in the stone cases showed a typical meniscus in 10 (55.6%), abrupt cutting in four (22.2%) and were indiscernible in four (22.2%). But of the 10 carcinoma cases four (40%) were of abrupt cutting, two (20%) funnel-shaped and were indiscernible in four (40%). 5. The frequency of posterior acoustic shadows was 11 (61.1%) in the stones and only one in the carcinomas. 6. The diameter of the extrahepatic biliary tree proximal to the obstructive site did not seem to be difinite factor in fidderentiating carcinomas from stones since both stone and carcinoma cases showed dilatation of the extrahepatic bileduct. 7. The extrahepatic biliary stones in general were characteristic of multiple, high or moderate echogemecity with a sharp margin as well as a posterior acoustic shadow. The extrahepatic biliary carcinomas, however, presented single slight echogenecity with a blurred margin without a posterior acoustic shadow.

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