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Radiology, Vol 193, 67-70, Copyright © 1994 by Radiological Society of North America

ARTICLES

Small hepatocellular carcinoma: evaluation of portal blood flow with CT during arterial portography performed with balloon occlusion of the hepatic artery

S Saitoh, K Ikeda, I Koida, A Tsubota, Y Arase, K Chayama and H Kumada
Department of Gastroenterology, Toranomon Hospital, Tokyo, Japan.

PURPOSE: To evaluate portal blood flow in small hepatocellular carcinomas (HCCs) by means of computed tomography during arterial portography (CTAP) and CTAP with hepatic arterial obstruction (CTP-HAO) achieved by means of balloon occlusion. MATERIALS AND METHODS: Thirteen patients with small HCC (< 20 mm in diameter) underwent CTAP, CTP-HAO, carbon dioxide-enhanced ultrasound (CEUS), and digital subtraction angiography (DSA). The imaging findings were correlated with histologic features. RESULTS: The first group of patients (n = 3) had tumors with portal blood flow at both CTAP and CTP-HAO and no hypervascularity at CEUS. The second group (n = 3) had tumors with portal blood flow at CTP- HAO but not at CTAP and hypervascularity at CEUS only. The third group (n = 7) had tumors without portal blood flow at CTAP or CTP-HAO and hypervascularity at DSA and CEUS. The first and second groups had well- differentiated HCCs; six of seven patients in the third group had moderately differentiated HCCs. CONCLUSION: Lack of portal blood flow was reversible in well-differentiated HCCs but irreversible in the other tumors.


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