胰岛细胞瘤的MRI表现与鉴别诊断

目的探讨MRI在胰岛细胞瘤诊断和鉴别诊断中的价值。方法回顾性分析病理证实的9例胰岛细胞瘤的MRI表现特点。MRI检查包括SET1WI、抑脂FSET2WI和FSPGR动态增强扫描。结果9例在MRI共发现10个病灶,1例无功能胰岛细胞瘤有2个病灶。抑脂T2WI高信号(7/10),抑脂FSPGRT1WI低信号(7/10)。三期明显强化(4/10);动脉期强化不明显,静脉和平衡期强化逐渐明显(4/10);环形强化(2/10)。结论MR检查在胰岛细胞瘤诊断和鉴别诊断中有重要价值。

MRI diagnosis and differentiation of pancreatic islet cell tumors

Objective To investigate the value of MR imaging in diagnosis and differentiation of pancreatic islet cell tumors. Methods Nine patients with pathologically proven pancreatic islet cell tumors were included in this study. SE T1WI, FSE T2WI with fat suppression, dynamic contrast-enhanced FSPGR and delayed SE T1WI sequences were used in MR scanning. Results There were ten lesions of pancreas on MR images among these ten patients. One patient of non-functioning islet cell tumor had two lesions. Seven lesions (7/10) were hyperintensity on T2WI with fat suppression and hypointensity on T1WI of FSPGR sequence. On the dynamic images after Gd-DTPA, four lesions (4/10) were enhanced obviously on all phases, four lesions were mild enhanced on arterial phase and intense enhanced on venous and parenchyma phases gradually, two lesions were not enhanced in the center and were enhanced surrounded. Conclusion MRI is of great value in the diagnosis and differentiation of islet cell tumors.