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. 2017 Jan 14;23(2):275–285. doi: 10.3748/wjg.v23.i2.275

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©The Author(s) 2017. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial.

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Non-hyperfunctioning pancreatic neuroendocrine neoplasm of the pancreatic head classified as G2, stage 3b tumor at histology (Ki67 15%, T4, N1, M0) in a 55 years-old man. A: Axial volumetric interpolated breath-hold examination (VIBE) gradient echo image (repetition time msec/echo time msec, 4.3/1.4) with fat suppression shows a hypointense tumor with ill-defined margins (arrow); B: On coronal fat-saturated T1-weighted volumetric interpolated breath-hold examination (VIBE) gradient echo image (TR/TE 3.5/1.3 ms) acquired during the delayed phase of the dynamic study the tumor shows heterogeneous contrast enhancement, with infiltration of the superior mesenteric vein (arrow); C: The tumor presents intermediate mean ADC value; D: The surgical specimen (pancreaticoduodenectomy with en bloc resection of the superior mesenteric vein, transverse cut) shows a large lesion of the pancreatic head with irregular margins infiltrating the superior mesenteric vein (arrow).