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KMID : 0378619950120010139
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Baptist Hospital Medical Journal
1995 Volume.12 No. 1 p.139 ~ p.144
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Intrahepatic Duct Dilatation Caused by Extrahepatic Billiary Obstruction Morphologic Differentiation Between Benign and Malignant Disease on CT Scan
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강은주
백승국/김봉기/최한용
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Abstract
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Intrahepatic Duct Dilatation Caused by Extrahepatic Biliary Obstruction : Morphologic Differentiation Between Benign and Malignant Disease on CT Scan.
@ES Purpose :
@EN Retrospective studies were carried out to evaluate the usefulness of CT in differentiating benign or malignant intrahepatic duct(IHD) dilatation due to extrahepatic duct(EHD) obstruction.
@ES Meterial and methods :
@EN Among 75 cases of IHD dilatation, 35 cases(47) which did not show causative lesion on CT were classified into central or peripheral type according to the extent of the dilatation and into pruned or beaded form according to its pattern. We
considered
central type or pruned from as a benign feature while peripheral type or beaded form as a malignant feature. Predictions of benignancy or malignancy were made according to the pattern and the extent of IHD dilatation. In all 75 cases, maximum
caliber of
IHD at portal vein bifurcation were examined.
@ES Results :
@EN In regard to the classification of the extent, 80% (28 of the 35 cases : 11 of 15 cases of benignancy and 17 of 20 cases of malignancy) of our prediction was correct. As to the classification of the pattern, similar results(82% correct
prediction)
were obtained(14 out of 17 cases) : In 15 cases of benignancy, we observed six cases of pruning and one case of beading. Among the 20 cases of malignancy, two cases of pruning and eight cases of beading of IHD dilation were observed. Mean
diameter
of
IHD at portal vein bifurcation ware 10.1mm in benignancy and 15.1mm in malignancy. (Diameters less than 11mm was suggestive of benignancy(a=0.05).
@ES Conclusion :
@EN Evaluation of the extent, the pattern, and the degree of IHD dilatation is necessary in differential diagnosis of benignancy and malignancy of EHD obstruction. We conclude that CT is a useful tool for this purpose of differential diagnosis of
the
benignancy and the malignancy of extrahepatic biliary obstruction.
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KEYWORD
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