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Diagnostic performance of endoscopic ultrasound for detection of pancreatic malignancy following an indeterminate multidetector CT scan: a systemic review and meta-analysis

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Abstract

Background

Pancreatic ductal adenocarcinoma (PDAC) has a dismal prognosis in part due to delayed diagnosis. Even with advances in cross-sectional imaging, small pancreatic malignancies can be missed. We sought to determine the performance of endoscopic ultrasound (EUS) in those without an obvious mass on multi-detector CT scan (MDCT), but with clinical suspicion for pancreatic malignancy.

Methods

Multiple databases were systematically searched to identify studies that assessed the diagnostic performance of EUS after negative or inconclusive pancreatic protocol MDCT for detection of pancreatic malignancy when clinically suspected. A total of four studies met the inclusion criteria. The point estimates in each study were compared to the summary pooled estimates of sensitivity and specificity with the aid of forest plots. Funnel plots and Egger’s test were employed to evaluate possible publication bias.

Results

EUS-guided fine needle aspiration was performed in all studies. EUS was performed in 206 subjects with a clinical suspicion of a pancreatic mass but with an indeterminate MDCT. A pancreatic mass (mean size 21 ± 1.2 mm) was identified in 70% (n = 144) of the subjects, and 42.2% (n = 87) were diagnosed with PDAC. The pooled estimates of EUS for diagnosing pancreatic malignancy in the setting of an indeterminate MDCT were a sensitivity of 85% (95% CI 69–94%), specificity of 58% (95% CI 40–74%), positive predictive value of 77% (69–84%), negative predictive value of 66% (95% CI 53–77%), and an accuracy of 75% (95% CI 67–82). The summary area under the ROC curve was 0.80 (95% CI 0.52–0.89). The funnel plots and Egger’s test did not show a significant publication bias.

Conclusions

The yield of EUS is comparatively higher for the diagnosis of a pancreatic malignancy in patients with suspected cancer, but a non-diagnostic MDCT. Importantly, the majority of the lesions missed on CT represent PDAC, in which early diagnosis is essential.

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Authors and Affiliations

  1. Section of Advanced Endoscopy, Division of Gastroenterology, Hepatology and Nutrition, The Ohio State University Wexner Medical Center, 395 West 12th Avenue, Columbus, OH, 43210, USA

    Somashekar G. Krishna

  2. Section of Pancreatic Disorders, Division of Gastroenterology, Hepatology and Nutrition, The Ohio State University Wexner Medical Center, Columbus, OH, USA

    Somashekar G. Krishna, Darwin L. Conwell & Phil A. Hart

  3. Digestive Disease and Surgery Institute, Cleveland Clinic, Cleveland, OH, USA

    Bhavana B. Rao

  4. Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, USA

    Emmanuel Ugbarugba

  5. Department of Radiology, The Ohio State University Wexner Medical Center, Columbus, OH, USA

    Zarine K. Shah

  6. The Ohio State University College of Medicine, Columbus, OH, USA

    Alecia Blaszczak

  7. Division of Biostatistics, College of Public Health, The Ohio State University, Columbus, OH, USA

    Alice Hinton

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  1. Somashekar G. Krishna
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Correspondence to Somashekar G. Krishna.

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Drs. Somashekar G. Krishna, Bhavana B. Rao, Emmanuel Ugbarugba, Zarine K. Shah, Alecia Blaszczak, Alice Hinton, Darwin L. Conwell, and Phil A. Hart have no conflicts of interest or financial ties to disclose.

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Krishna, S.G., Rao, B.B., Ugbarugba, E. et al. Diagnostic performance of endoscopic ultrasound for detection of pancreatic malignancy following an indeterminate multidetector CT scan: a systemic review and meta-analysis. Surg Endosc 31, 4558–4567 (2017). https://doi.org/10.1007/s00464-017-5516-y

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