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Diagnostic value of magnetic resonance cholangiopancreatography for secondary common bile duct stones compared with laparoscopic trans-cystic common bile duct exploration.

Li P, Zhang Z, Li J, Jin L, Han W, Zhang J - Med. Sci. Monit. (2014)

Bottom Line: When the cases with muddy stones were excluded, the outcomes were 80.41%, 79.41%, 69.23%, 94.44%, and 48.21%, respectively.When cases with stones <3 mm (inclusive) in diameter were excluded, the outcomes were 93.75%, 79.41%, 86.27%, 93.75%, and 65.85%, respectively.When cases with stones <5 mm (inclusive) in diameter were excluded, the outcomes were 93.10%, 79.41%, 89.26%, 92.05%, and 81.82%, respectively.

View Article: PubMed Central - PubMed

Affiliation: Department of Comprehensive Surgery, Medical and Health Center, Beijing Friendship Hospital affiliated to Capital Medical University, Beijing, China (mainland).

ABSTRACT

Background: The aim of this study was to evaluate the diagnostic potential of magnetic resonance cholangiopancreatography (MRCP) in preoperative patients with secondary common bile duct stones during the application of laparoscopic trans-cystic common bile duct exploration (LTCBDE).

Material and methods: The clinical records of 255 patients were retrospectively analyzed. All patients included in the study were examined by MRCP 3 days prior to LTCBDE.

Results: Secondary bile duct stones were detected in 220 patients using LTCBDE. Of the patients diagnosed by MRCP, 141 were true-positive, 28 were true-negative, 7 were false-positive and 79 were false-negative. The sensitivity, specificity, accuracy, positive predictive value, and negative predictive value of MRCP for secondary common bile duct stones were 64.09%, 80.00%, 66.27%, 95.27%, and 26.17%, respectively. When the cases with muddy stones were excluded, the outcomes were 80.41%, 79.41%, 69.23%, 94.44%, and 48.21%, respectively. When cases with stones <3 mm (inclusive) in diameter were excluded, the outcomes were 93.75%, 79.41%, 86.27%, 93.75%, and 65.85%, respectively. When cases with stones <5 mm (inclusive) in diameter were excluded, the outcomes were 93.10%, 79.41%, 89.26%, 92.05%, and 81.82%, respectively.

Conclusions: The effectiveness of preoperative MRCP is overestimated for the diagnosis of secondary common bile duct stones, particularly for muddy and micro-stones.

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Large stone.
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f1-medscimonit-20-920: Large stone.

Mentions: To further analyze the accuracy of MRCP, this study defined stones with diameters >5 mm as large stones (Figure 1), between 3 and 5 mm (inclusive) as small stones (Figure 2), and <3 mm (inclusive) as micro-stones (Figure 3). The remaining stones were classified as muddy stones (Figure 4). Among the 220 patients identified with CBD stones by LTCBDE, 121 patients (55.00%) had large stones, 32 (14.55%) had small stones, 29 (13.18%) had micro-stones, and 73 (33.18%) had muddy stones. Among the 79 false-negative cases indicated by MRCP, 6 patients (7.59%) had large stones, 8 (10.13%) had small stones, 15 (18.99%) had micro-stones, and 50 (63.29%) had muddy stones.


Diagnostic value of magnetic resonance cholangiopancreatography for secondary common bile duct stones compared with laparoscopic trans-cystic common bile duct exploration.

Li P, Zhang Z, Li J, Jin L, Han W, Zhang J - Med. Sci. Monit. (2014)

Large stone.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4061148&req=5

f1-medscimonit-20-920: Large stone.
Mentions: To further analyze the accuracy of MRCP, this study defined stones with diameters >5 mm as large stones (Figure 1), between 3 and 5 mm (inclusive) as small stones (Figure 2), and <3 mm (inclusive) as micro-stones (Figure 3). The remaining stones were classified as muddy stones (Figure 4). Among the 220 patients identified with CBD stones by LTCBDE, 121 patients (55.00%) had large stones, 32 (14.55%) had small stones, 29 (13.18%) had micro-stones, and 73 (33.18%) had muddy stones. Among the 79 false-negative cases indicated by MRCP, 6 patients (7.59%) had large stones, 8 (10.13%) had small stones, 15 (18.99%) had micro-stones, and 50 (63.29%) had muddy stones.

Bottom Line: When the cases with muddy stones were excluded, the outcomes were 80.41%, 79.41%, 69.23%, 94.44%, and 48.21%, respectively.When cases with stones <3 mm (inclusive) in diameter were excluded, the outcomes were 93.75%, 79.41%, 86.27%, 93.75%, and 65.85%, respectively.When cases with stones <5 mm (inclusive) in diameter were excluded, the outcomes were 93.10%, 79.41%, 89.26%, 92.05%, and 81.82%, respectively.

View Article: PubMed Central - PubMed

Affiliation: Department of Comprehensive Surgery, Medical and Health Center, Beijing Friendship Hospital affiliated to Capital Medical University, Beijing, China (mainland).

ABSTRACT

Background: The aim of this study was to evaluate the diagnostic potential of magnetic resonance cholangiopancreatography (MRCP) in preoperative patients with secondary common bile duct stones during the application of laparoscopic trans-cystic common bile duct exploration (LTCBDE).

Material and methods: The clinical records of 255 patients were retrospectively analyzed. All patients included in the study were examined by MRCP 3 days prior to LTCBDE.

Results: Secondary bile duct stones were detected in 220 patients using LTCBDE. Of the patients diagnosed by MRCP, 141 were true-positive, 28 were true-negative, 7 were false-positive and 79 were false-negative. The sensitivity, specificity, accuracy, positive predictive value, and negative predictive value of MRCP for secondary common bile duct stones were 64.09%, 80.00%, 66.27%, 95.27%, and 26.17%, respectively. When the cases with muddy stones were excluded, the outcomes were 80.41%, 79.41%, 69.23%, 94.44%, and 48.21%, respectively. When cases with stones <3 mm (inclusive) in diameter were excluded, the outcomes were 93.75%, 79.41%, 86.27%, 93.75%, and 65.85%, respectively. When cases with stones <5 mm (inclusive) in diameter were excluded, the outcomes were 93.10%, 79.41%, 89.26%, 92.05%, and 81.82%, respectively.

Conclusions: The effectiveness of preoperative MRCP is overestimated for the diagnosis of secondary common bile duct stones, particularly for muddy and micro-stones.

Show MeSH