Clinical Management of Intraductal Papillary Mucinous Tumors of the Pancreas Based on Imaging Findings

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Abstract
The aim of this study was to assess the imaging findings of pathologically proven intraductal papillary-mucinous tumors of the pancreas and the natural history of follow-up cases, and to optimize the therapeutic management of patients with these tumors according to their imaging findings. All nine patients with main duct type tumors were histologically diagnosed as having adenocarcinoma or adenoma, with no hyperplastic lesion. The images failed to discriminate between the two histologic types. In 26 patients with branch duct type tumors, all but one with intraductal mural nodules or tumors of ≧30 mm had adenocarcinoma or adenoma, regardless of the caliber of the main duct. Of the nine patients with tumors