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논문 기본 정보

자료유형
학술저널
저자정보
이상훈 (전북대학교 의과대학 진단방사선과학교실)
저널정보
대한영상의학회 대한방사선의학회지 대한방사선의학회지 제33권 제1호
발행연도
1995.1
수록면
87 - 92 (6page)

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Purpose : Periportal low attenuation, defined as a low attenuation rim around the portal vein and its brancheswhich is seen on contrast material-enhanced CT scans, has been described in a variety of conditions. We tried todocument that lymphatic obstruction is one of the major cause of periportal low attenuation. Methods and Materials: We retrospectively analyzed 57 cases of periportal low attenuation on abdominal CT scans and also reviewed thesurgical records in 32 cases. Lymph node enlargement in the hepatoduodenal ligament which is a main lymphaticchannel from the liver were analyzed and calculated the ratio of the transeverse diameter between the inferiorvena cava and the aorta at the level of right adrenal gland. After complete surgical interruption of the lymphaticdrainage from the liver in a dog, follow up CT scans were obtained and correlated with pathologic findings.Results : Fifty patients(88%) had underlying disease which could cause impairment of lymphatic drainage.Periportal low attenuation was identified in several clinical conditions, including surgical lymph nodedissection, lymphadenopathy in the hepatoduodenal ligament, blunt trauma. In animal model, CT scan showedprominent periportal low attenuation at 5 days after surgery. Histologic examination revealed numerous dilatedlymphatic vessels and a marked lymphedema in the connective tissues surrounding the portal vein and its majorbranches. Conclusion : One of the major cuase of periportal low attenuation was impaired lymphatic drainage andperiportal low attenuation corresponded to the numerous dilated lymphatic vessels and a marked lymphedema in theconnective tissues surrounding the portal vein and its major branches.

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