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KMID : 0359020090390010014
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Korean Journal of Gastrointestinal Endoscopy
2009 Volume.39 No. 1 p.14 ~ p.21
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The Usefulness of 64-Multidetector CT Cholangiography for Diagnosis of Distal Common Bile Duct Obstruction: Comparison with Endoscopic Retrograde Cholangiopancreatography
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Choi Jae-Hyun
Lee Mi-Yun
Jeon Won-Joong
Chae Hee-Bok
Park Seon-Mee
Youn Sei-Jin
Choi Jae-Woon
Bae Il-Hun
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Abstract
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Background/Aims: The aim of this study was to evaluate the diagnostic accuracy of 64-multidetector CT (MDCT) cholangiography for determining the causes of distal common bile duct (CBD) obstruction.
Methods: Two hundred fifty consecutive patients underwent 64-MDCT for diagnosing the clinical and biochemical signs of bile duct obstruction. The causes of bile duct obstruction were assessed by the pre- and post-enhanced axial and coronal multiplanar reformation images of 64-MDCT. The results were compared with ERCP, biopsy and surgery.
Results: The sensitivity and specificity of MDCT for CBD stones were 96.1% and 84.9%, respectively. In seven patients, The CBD stones in 7 patients could not be detected on MDCT. Eleven patients with stones in the distal CBD, as detected on MDCT, had no stones seen on ERCP. For malignant obstruction, the sensitivity and specificity of MDCT were 97.0% and 98.6%, respectively. Three patients who were diagnosed with periampullary cancers on MDCT were disclosed to have severe papillitis on ERCP. One patient who was diagnosed with CBD stone by MDCT was disclosed to have ampullary cancer. The overall accuracy of MDCT for determining the causes of biliary obstruction was 90.5%.
Conclusions: MDCT cholangiography is a non-invasive method with relatively high sensitivity and high specificity for diagnosing the causes of distal CBD obstruction.
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KEYWORD
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64 channel MDCT cholangiography, Bile duct obstruction, ERCP
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