Hypervascular solid-appearing serous cystic neoplasms of the pancreas: Differential diagnosis with neuroendocrine tumours

European Radiology
Hye Sun ParkMoon-Gyu Lee

Abstract

To describe imaging findings of arterial hypervascular solid-appearing serous cystic neoplasms (SCNs) of the pancreas on CT and MR and determine imaging features differentiating them from neuroendocrine tumours (NETs). We retrospectively identified 15 arterial hypervascular solid-appearing SCNs and randomly chose 30 size-matched pancreatic NETs. On CT, two radiologists in consensus assessed the size, morphology, and CT attenuation. On MR, predominant signal intensity and the amount of the cystic component on T2-weighted images and ADC maps were evaluated and compared using Fisher's exact and Student's t-test. The mean SCN size was 2.6 cm (range, 0.8-8.3). The CT findings were similar between the two tumours: location, shape, margin, and enhancement pattern. SCNs were significantly more hypodense on non-enhanced CT images than NETs (P = .03). They differed significantly on MR: bright signal intensity (P = .01) and more than a 10% cystic component on T2-weighted images (P = .01) were more common in SCNs than in NETs. All SCNs showed a non-restrictive pattern on the ADC map, while NETs showed diffusion restriction (P < .01). Arterial hypervascular solid-appearing SCNs and NETs share similar imaging features. Non-enhanced CT and MR...Continue Reading

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Citations

Nov 7, 2016·Human Pathology·So-Woon KimSeung-Mo Hong
Mar 27, 2018·Gut·UNKNOWN European Study Group on Cystic Tumours of the Pancreas
Mar 30, 2016·World Journal of Gastrointestinal Surgery·Xiao-Peng ZhangMeng-Hua Dai
Jul 6, 2018·Expert Review of Anticancer Therapy·Lingaku LeeRobert T Jensen
Mar 30, 2018·Abdominal Radiology·Nam Ju LeeElliot K Fishman
Aug 11, 2021·Insights Into Imaging·Giovanni MoranaSilvia Venturini

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