Ultrasonography.  2020 Jul;39(3):247-256. 10.14366/usg.19078.

Factors affecting the ability of abdominal ultrasonography to detect focal pancreatic lesions identified using endoscopic ultrasonography

Affiliations
  • 1Department of Radiology, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
  • 2Department of Radiology, Seoul National University Hospital, Seoul, Korea
  • 3Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul, Korea
  • 4Department of Radiology, Samsung Medical Center, Seoul, Korea
  • 5Department of Radiology, Pusan National University Yangsan Hospital, Yangsan, Korea

Abstract

Purpose
This study was conducted to determine which factors influence the ability of abdominal ultrasonography (US) to detect focal pancreatic lesions identified using endoscopic ultrasonography (EUS).
Methods
In this study, 338 consecutive patients with focal pancreatic lesions (cyst, n=253; adenocarcinoma, n=54; pancreatic neuroendocrine tumor, n=24; solid pseudopapillary neoplasm, n=4; intrapancreatic accessory spleen, n=1; metastasis, n=1; and lymphoma, n=1) detected by EUS who underwent US were enrolled. We reviewed their radiologic reports and assessed the presence or absence of a focal lesion, the multiplicity of the lesions, and their size and location on US. We evaluated how these parameters differed depending on whether the lesion was solid or cystic. Univariate and multivariate logistic regression analysis were performed.
Results
The overall detection rate of focal pancreatic lesions by US was 61.5% (208 of 338). Using US, the detection rate of cystic lesions was 58.5% (148 of 253), while that of solid lesions was 70.6% (60 of 85). In the univariate analysis, location in the neck or body, solid characteristics, and a relatively large size (15.50±10.08 mm vs. 23.09±12.93 mm) were associated with a significantly higher detection rate (P<0.001, P=0.047, and P<0.001, respectively). In the multivariate analysis, location in the neck or body (odds ratio [OR], 3.238; 95% confidence interval [CI], 1.926 to 5.443; P<0.001) and size (OR, 1.070; 95% CI, 1.044 to 1.096; P<0.001) were proven to be significant predictors of detectability (P<0.001).
Conclusion
US is useful for detecting focal pancreatic lesions, especially when they are located in the neck or body and are relatively large.

Keyword

Pancreas; Ultrasonography; Neoplasms; Cysts; Endoscopy
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