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Characterization of Portal Vein Thrombus With the Use of Contrast‐Enhanced Sonography
Author(s) -
Ueno Norio,
Kawamura Harunobu,
Takahashi Hirokazu,
Fujisawa Nobutaka,
Yoneda Masato,
Kirikoshi Hiroyuki,
Sakaguchi Takashi,
Saito Satoru,
Togo Shinji
Publication year - 2006
Publication title -
journal of ultrasound in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 91
eISSN - 1550-9613
pISSN - 0278-4297
DOI - 10.7863/jum.2006.25.9.1147
Subject(s) - medicine , thrombus , radiology , malignancy , portal vein thrombosis , thrombosis , portal vein , venous thrombosis , pulsatile flow , contrast (vision) , portal venous system , vein , portal hypertension , cirrhosis , artificial intelligence , computer science
Objectives. To select an appropriate treatment regimen, it is essential to accurately characterize the nature of a thrombus. This study prospectively assessed the ability of contrast‐enhanced sonography to differentiate between benign and malignant portal vein thrombosis in a population of high‐risk patients. Methods. Fifty‐five patients (43 men and 12 women; mean age, 66 years; range, 55–83 years) with thrombi of the portal venous system were examined by power Doppler sonography and contrast‐enhanced sonography with the intravenous contrast agent SH U 508A (Levovist; Schering AG, Berlin, Germany). Of the thrombi, 40 were characterized as malignant and 15 as benign. Pulsatile flow in the thrombus on power Doppler sonography and positive enhancement of the thrombus on contrast‐enhanced sonography were judged as indications of a malignant thrombus. The sensitivity and specificity of both methods in differentiating the nature of the thrombus were evaluated. Results. The detection of pulsatile flow in a portal vein thrombus as the criterion for diagnosing malignant portal vein thrombus yielded overall sensitivity of 82.5% and specificity of 100%, whereas positive enhancement of the portal vein thrombus itself as a criterion for diagnosing malignancy yielded overall sensitivity and specificity of 100% for each. Conclusions. Contrast‐enhanced sonography can be helpful in discriminating between benign and malignant portal vein thrombi.