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KMID : 0378119950220020465
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Chungnam Medical Journal
1995 Volume.22 No. 2 p.465 ~ p.472
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Differentiation of Hepatocellular Carcinoma with Bile Buct Invasion from Intrahepatic Cholangiocarcinoma : Value of Arterial Phase Dynamic CT with a Higher Intravenous Injection Rate of Contrast Material
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Abstract
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PURPOSE :
@EN To evaluate the value of arterial phase dynamic computed tomography (CT) with a higher intravenous (VI) injection rate of contrast material in diagnosing hepatocellular carcinoma (HCC) with bile duct invasion mimicking intrahepatic
cholangiocarcinoma (CAC).
@ES MATERIALS AND METHODS :
@EN Two-phase dynamic CT was performed in 19 patients with pathologically proven HCCs (n=9) and CACs (n=10). Two-phase images were obtained at 20-50 sec (arterial phase) and 2-4 min (equilibrium phase) after the start of IV injection of contrast
material (5 ml/sec, 150 ml). Two-phase images were compared and correlated with pathologic findings.
@ES RESULTS :
@EN On the arterial phase images, HCCs showed total heterogeneous hyperattenuation in all nine and CACs showed hypoattenuation in seven and hypoattenuation with peripheral rim enhancement in three. On the equilibrium phase images, all HCCs showed
hypoattenuation and capsular enhancement in four. However, all CACs showed hypoattenuation with peripheral or inhomogeneous isodense enhancement. Enhancement patterns of HCCs with bile duct invasion in the arterial phase were significantly
different
from that of intrahepatic CACs.
@ES CONCLUSION :
@EN Arterial phase dynamic CT with a higher IV injection rate of contrast material enables HCC with bile duct invasion to differentiate from intrahepatic CAC.
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KEYWORD
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