关键词: 胰岛素瘤, 诊断, 多层螺旋CT检查, 磁共振成像

Abstract: Objective To analyze the Multislice CT(MSCT) and MRI features of insulinoma. Methods MSCT and MRI findings in eighteen patients with surgical-pathologically-proved insulinoma were retrospectively analyzed. Results Seventeen cases of insulinoma had only one single tumor in every patient, except one case had three lesions. The range of the maximum diameter was between 0.3 and 2.0cm. Most of the insulinoma appeared iso-density and light hypo-density on CT plain scan. MRI showed hypo-intensity signal and light hypo-intensity signal on T1WI and hyper-intensity signal and light hyper-intensity signal on T2WI. These cases showed intensely enhancement on the arterial phase and iso-enhancement on the parenchymal and portal venous phases on dynamic contrast enhancement (DCE) MSCT and DCE MRI. Conclusion The insulinoma reveals some characteristic imaging features, which were based on the pathological changes. DCE MSCT should be the preferred means of screening insulinoma. The relevant ratio of the insulinoma can be significantly improved by rational utilization of DCE MSCT and MRI.

Key words: Insulinoma, Diagnosis, Multidetector Computed Tomography, Magnetic Resonance Imaging