Pancreatic Neuroendocrine Tumors: Correlation between the Imaging Findings and Pathology
Abstract: Objective: To investigate imaging features of pancreatic neuroendocrine tumors (PanNETs), so as to improve its clinical diagnosis. Materials and Methods: A retrospective analysis of the imaging data of 24 patients with pathologically confirmed PanNETs is conducted and the results were compared with the pathology. Results: There were 8 functional PanNETs with an average size of 2.1 cm × 2.6 cm, which showed homogeneous density or signal, 1 case of which had invasion of duodenum. There were 16 non-functional PanNETs with an average size of 2.5 cm × 4.3 cm, nine of which were solid lesions, seven of which were cystic lesions. Solid part of the PanNETs showed equal or slightly low density, and slightly longer T1, T2 signal in the MRI. Cystic part of the PanNETs showed water-like density or signal. 6 cases had unclear boundaries with duodenum, 1 case had unclear boundaries with spleen, and two cases appeared to thinner splenic vein. 5 cases had lymph node metastasis in retroperitoneal or peripancreatic. Contrast-enhanced examinations showed that 17 lesions had marked enhancement, 7 lesions had mild-moderate enhancement, and 9 lesions had capsule marked ring-like enhancement. 19 lesions had decreased enhancement in the portal venous phase and delay phase, 3 lesions had progressive enhancement, and 2 lesions had filled enhancement. The preoperative accuracy of diagnosis compared with pathology was 67% (16/24). Conclusion: Functional PanNETs could be manifested as small solid nodules, and non-functional ones could be manifested as large heterogeneous lump. PanNETs were characterized by marked enhancement with capsule marked ring-like enhancement during contrast scanning, mild-moderate enhancement and obviously cystic changes were relatively rare.
文章引用: 张玉婷 , 李大铭 , 魏丰贤 , 王丹 , 周俊林 (2016) 胰腺神经内分泌肿瘤的影像学表现与病理对照分析。 医学诊断， 6， 59-67. doi: 10.12677/MD.2016.63011
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