Determining Malignant Potential of Intraductal Papillary Mucinous Neoplasm of the Pancreas: CT versus MRI Using Revised 2017 International Consensus Guidelines.

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Determining Malignant Potential of Intraductal Papillary Mucinous Neoplasm of the Pancreas: CT versus MRI Using Revised 2017 International Consensus Guidelines Based on the revised guideline, CT and MRI showed comparable sensitivities (86% and 89%), specificities (74% and 83%), and accuracies (78% and 85%), respectively, when malignant pancreatic intraductal papillary mucinous neoplasms (IPMNs) were defined as lesions with at least one high-risk stigmata or four or more worrisome features. The diagnostic performance of contrast-enhanced CT (AUC, 0.83) and MRI (AUC, 0.86) are comparable (P = .43, with good intermodality agreement; k = 0.70) for the evaluation of pancreatic IPMNs. a b In a 56-year-old with IPMN with invasive carcinoma, (a) CT shows a large cystic mass in the pancreatic head (asterisk) with enhancing mural nodules (arrows) and the pancreatic duct is dilated (arrowheads). (b) MRI shows enhancing mural nodules (arrowheads). Lee JE et al. Published Online: September 3, 2019 https://doi.org/10.1148/radiol.2019190144