The Korean journal of internal medicine

The Korean Association of Internal Medicine (대한내과학회)
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Clinical efficacy of serum lipase subtype analysis for the differential diagnosis of pancreatic and non-pancreatic lipase elevation

  • Bang, Chang Seok (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Kim, Jin Bong (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Park, Sang Hyun (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Baik, Gwang Ho (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Su, Ki Tae (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Yoon, Jai Hoon (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Kim, Yeon Soo (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Kim, Dong Joon (Department of Internal Medicine, Hallym University College of Medicine)
  • Received : 2015.01.11
  • Accepted : 2015.06.09
  • Published : 2016.07.01
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Abstract

Background/Aims: Non-pancreatic elevations of serum lipase have been reported, and differential diagnosis is necessary for clinical practice. This study aimed to evaluate the clinical efficacy of serum lipase subtype analysis for the differential diagnosis of pancreatic and non-pancreatic lipase elevation. Methods: Patients who were referred for the serum lipase elevation were prospectively enrolled. Clinical findings and serum lipase subtypes were analyzed and compared by dividing the patients into pancreatitis and non-pancreatitis groups. Results: A total of 34 patients (12 pancreatitis vs. 22 non-pancreatitis cases) were enrolled. In univariate analysis, the fraction of pancreatic lipase (FPL) in the total amount of serum lipase subtypes was statistically higher in patients with pancreatitis ([median, 0.004; interquartile range [IQR], 0.003 to 0.011] vs. [median, 0.002; IQR, 0.001 to 0.004], p = 0.04). Based on receiver operating characteristic curve analysis for the prediction of acute pancreatitis, FPL was the most valuable predictor (area under the receiver-operating characteristic curve [AUROC], 0.72; 95% confidence interval [CI], 0.54 to 0.86; sensitivity, 83.3%; specificity, 63.6%; positive predictive value, 55.6%; negative predictive value, 97.5%). In multivariate analysis, a cut-off value higher than 0.0027 for the FPL was associated with acute pancreatitis (odds ratio, 8.3; 95% CI, 1.3 to 51.7; p = 0.02). Conclusions: The results did not support that serum lipase subtype analysis could replace standard lipase measurement for the diagnosis of acute pancreatitis. However, the test demonstrated adequate sensitivity for use in triage or as an add-on test for serum lipase elevation.

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References

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