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Radiology, Vol 206, 161-166, Copyright © 1998 by Radiological Society of North America
ARTICLES |
K Ueda, O Matsui, Y Kawamori, Y Nakanuma, M Kadoya, J Yoshikawa, T Gabata, A Nonomura and T Takashima
Department of Radiology, Kanazawa University School of Medicine, Japan.
PURPOSE: To assess the hemodynamics and the main drainage vessel of hypervascular hepatocellular carcinoma. MATERIALS AND METHODS: Single- level dynamic computed tomography during hepatic arteriography (CTHA) was performed in 32 patients with hepatocellular carcinoma. Carcinoma was confirmed with histologic (n = 9) or clinical (n = 23) examination results. Single-level CTHA findings were retrospectively analyzed. Histologic specimens from 40 livers with hepatocellular carcinoma were also examined, with special attention to vessels along the rim of the lesion. RESULTS: Contrast material enhancement on single-level CTHA images occurred in four phases: (a) inflow of the contrast material into tumor, (b) tumor enhancement, (c) inflow of the contrast material into adjacent liver, and (d) corona enhancement of adjacent liver. Corona enhancement was seen in all lesions. A bright branching structure in the corona enhancement area, suggestive of a portal venule, was visible at the start of adjacent liver staining in 21 lesions. Continuity between a tumor sinusoid and a tiny vessel in the inner layer of the pseudocapsule was histologically confirmed in 10 of 40 specimens. Continuity between a tiny vessel in the inner layer and a portal vein in the outer layer of the pseudocapsule was confirmed with findings on serial sections from one liver. CONCLUSION: The main drainage of hepatocellular carcinoma lesions may be a protal venule.
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