Original Article
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Diagnostic Value of Endoscopic Ultrasonography for Common Bile Duct Dilatation without Identifiable Etiology Detected from Cross-Sectional Imaging
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Nonthalee Pausawasdi, Penprapai Hongsrisuwan, Lubna Kamani, Kotchakon Maipang, Phunchai Charatcharoenwitthaya
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Clin Endosc 2022;55(1):122-127. Published online January 3, 2022
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DOI: https://doi.org/10.5946/ce.2021.122
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Abstract
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- Background
/Aims: Endoscopic ultrasonography (EUS) is warranted when cross-sectional imaging demonstrates common bile duct (CBD) dilatation without identifiable causes. This study aimed to assess the diagnostic performance of EUS in CBD dilatation of unknown etiology.
Methods
Retrospective review of patients with dilated CBD without definite causes undergoing EUS between 2012 and 2017.
Results
A total of 131 patients were recruited. The mean age was 63.2±14.1 years. The most common manifestation was abnormal liver chemistry (85.5%). The mean CBD diameter was 12.2±4.1 mm. The area under the receiver operating characteristic curve (AUROC) of EUS-identified pathologies, including malignancy, choledocholithiasis, and benign biliary stricture (BBS), was 0.98 (95% confidence interval [CI], 0.95-1.00). The AUROC of EUS for detecting malignancy, choledocholithiasis, and BBS was 0.91 (95% CI, 0.85-0.97), 1.00 (95% CI, 1.00-1.00), and 0.93 (95% CI, 0.87-0.99), respectively. Male sex, alanine aminotransferase ≥3× the upper limit of normal (ULN), alkaline phosphatase ≥3× the ULN, and intrahepatic duct dilatation were predictors for pathological obstruction, with odds ratios of 5.46 (95%CI, 1.74-17.1), 5.02 (95% CI, 1.48-17.0), 4.63 (95% CI, 1.1-19.6), and 4.03 (95% CI, 1.37-11.8), respectively.
Conclusions
EUS provides excellent diagnostic value in identifying the etiology of CBD dilatation detected by cross-sectional imaging.
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Citations
Citations to this article as recorded by

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Focused Review Series: Image-Enhanced Endoscopy: Update on Clinical Practice
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Current Status of Image-Enhanced Endoscopy for Early Identification of Esophageal Neoplasms
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Shin Hee Kim, Su Jin Hong
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Clin Endosc 2021;54(4):464-476. Published online July 26, 2021
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DOI: https://doi.org/10.5946/ce.2021.186
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Abstract
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- Advanced esophageal cancer is known to have a poor prognosis. The early detection of esophageal neoplasms, including esophageal dysplasia and early esophageal cancer, is highly important for the accurate treatment of the disease. However, esophageal dysplasia and early esophageal cancer are usually subtle and can be easily missed. In addition to the early detection, proper pretreatment evaluation of the depth of invasion of esophageal cancer is very important for curative treatment. The progression of non-invasive diagnosis via image-enhanced endoscopy techniques has been shown to aid the early detection and estimate the depth of invasion of early esophageal cancer and, as a result, may provide additional opportunities for curative treatment. Here, we review the advancement of image-enhanced endoscopy-related technologies and their role in the early identification of esophageal neoplasms.
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