• Xiangke Niu, Sushant Kumar Das, Anup Bhetuwal, Yingquan Xiao, Feng Sun, Lichuan Zeng, Wenxuan Wang, Hanfeng Yang, and Hanyu Yang.
• Department of Radiology, Affiliated Hospital of Chengdu University, Chengdu, Sichuan 610081, China.
• Chin. Med. J. 2014 Jan 1; 127 (19): 347734823477-82.

BackgroundSeveral previous studies have shown that diffusion-weighted imaging (DWI) can provide additional information for focal pancreatic lesions by demonstrating more restricted diffusion in solid malignant tumors than in chronic pancreatitis, which can be indicated by a decreased apparent diffusion coefficient (ADC). However, these studies have a modest sample size and convey inconclusive results. The aim of this study was to determine, in a meta-analysis, the diagnostic performance of quantitative diffusion-weighted magnetic resonance imaging in distinguishing pancreatic carcinoma from mass-forming chronic pancreatitis.MethodsWe determined the sensitivities and specificities across studies. A summary receiver operator characteristic (sROC) curve was constructed to calculate the area under the curve (AUC).ResultsThe pooled sensitivity of DWI was 0.86 (95% CI: 0.80-0.91) and the pooled specificity was 0.82 (95% CI: 0.72-0.89). The AUC of the sROC was 0.91 (95% CI: 0.88-0.93).ConclusionsDWI may be a potentially technically feasible tool for differentiating pancreatic carcinoma from mass-forming chronic pancreatitis. However, large-scale randomized control trials are necessary to assess its clinical value.

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