胰岛素瘤的影像学表现与病理对照(附8例分析)  

Insulinoma:Imaging Features and Correlation with Pathological Findings(Analysis of 8 Cases)

作　　者：张羲娥[1,2] 涂媛[3] 黄子星[1] 宋彬[1] 钟欢欢[1] 赵爽[1] 

机构地区：[1]四川大学华西医院放射科,四川成都610041 [2]成都市第二人民医院放射科,四川成都610017 [3]四川大学华西医院病理科,四川成都610041

出　　处：《中国普外基础与临床杂志》2011年第3期336-340,共5页Chinese Journal of Bases and Clinics In General Surgery

基　　金：国家"十一五"科技支撑计划课题(项目编号:2007BA105B05);成都市科技计划项目(项目编号:10GGYB645SF-023)~~

摘　　要：目的探讨胰岛素瘤的多层螺旋CT（MSCT）和磁共振成像（MRI）的影像表现特征。方法回顾性分析2008年11月至2010年11月期间四川大学华西医院8例经手术病理证实的胰岛素瘤的MSCT及MRI表现,并与临床病理结果进行对照分析。6例行MRI检查,4例行MSCT检查,其中2例同时行MRI和MSCT检查。结果 8例胰岛素瘤均为单发,直径0.5-3.5 cm。MSCT平扫呈等密度或稍低密度结节,MRI平扫呈长T1、长或稍长T2信号结节,其中4例弥散加权成像呈较高信号改变。MSCT及MRI动态增强扫描后动脉期强化,门脉期和延时期强化减弱。结论胰岛素瘤的影像学表现具有一定的特征性,反映了胰岛素瘤的病理特点。MSCT和MRI均能清楚显示胰岛素瘤,并且MRI较MSCT能提供更多的诊断信息。Objective To investigate the imaging features of insulinoma on multi-slice spiral CT（MSCT） and magnetic resonance imaging（MRI） with correlation of pathology.Methods All images of 8 patients confirmed by surgery and pathology were retrospectively analyzed with correlation of pathology.MSCT scans were performed in 4 patients and MR scans in 6 patients,among which 2 patients accepted both MSCT and MRI examinations.Results Insulinoma in all patients manifested as solitary lesions with diameters of 0.5-3.5 cm.Four lesions demonstrated isodensity or hypodensity on plain MSCT,with significant enhancement on arterial phase,and relative isodensity or slight hyperdensity on portal phase and delay phase.On plain MRI,lesions demonstrated hyperintensity on T1WI,slight hyperintensity or hyperintensity on T2WI.The enhanced patterns of insulinoma were similar to the findings on MSCT.Conclusions The imaging characteristics of insulinoma reflect the pathological features.MSCT and MRI are effective in the diagnosis of inslinoma,and MRI can show more diagnostic information.

关 键 词：胰腺肿瘤 胰岛素瘤 体层摄影术 X线计算机 磁共振成像 

分 类 号：R736.7[医药卫生—肿瘤]