足底硬纤维瘤的MRI特征分析  

Analysis of MRI features of plantar desmoid tumor

作　　者：姚宁[1] 于爱红[1] 张晶[1] 张薇[1] 程晓光[1] 宫丽华[2] YAO Ning;YU Ai-hong;ZHANG Jing(Department of Radiology,Beijing Jishuitan Hospital,Beijing 100035,China)

机构地区：[1]北京积水潭医院放射科,北京100035 [2]北京积水潭医院病理科,北京100035

出　　处：《放射学实践》2020年第12期1585-1588,共4页Radiologic Practice

基　　金：北京市卫生系统高层次卫生技术人才培养项目(2009-02-03,2013-3-033)。

摘　　要：目的:探讨足底硬纤维瘤的MRI表现。方法:回顾性分析18例经手术病理证实的足底软组织硬纤维瘤患者的MRI资料。所有患者行MRI常规平扫,14例行增强检查。结果:18例中11例(61%)肿瘤发生于前足,5例(28%)发生于后足,2例(11%)发生于中足;形态上,肿瘤呈片状2例(11%),团块形4例(22%),不规则形12例(67%);边界不清6例(33%),边界尚清12例(67%)。肿块最大径为2.3~10.8 cm,中位数为3.7 cm。2例(11%)为多发病灶。MRI显示病灶在T1WI上呈等或等~低信号,T2WI及短时反转恢复序列(STIR)上呈稍高或高信号,但均低于脂肪组织的信号;15例(83%)可见病灶内信号不均匀,高信号区内有不同比例的星芒状或条带状低信号,1例(6%)病灶内可见点状出血信号;18例病灶内均未见囊变及钙化。增强扫描显示病灶内于T1WI、T2WI上呈低信号的区域无明显强化,其余部分呈较均匀明显强化。结论:足底硬纤维瘤的MRI表现具有一定特征性,MRI可为病变的诊断和鉴别诊断提供重要参考。Objective:To analyze the MRI manifestations of plantar desmoid tumor.Methods:The MRI data of eighteen patients with plantar desmoid tumor proven by pathology were retrospectively analyzed.Plain MRI scan was performed in all the 18 cases,and contrast-enhanced MRI scan in 14 cases.Results:In the 18 cases,11(61%)tumors were located in the forefoot,5(28%)in the hind-foot and 2(11%)in the mid-foot.Sixteen masses(89%)displayed as ovate or irregular soft tissue mass,and two(11%)lesions as irregular patchy lesions.Six(33%)lesions were with obscure boundary,while 12(67%)lesions clear.The maximum diameters of the masses ranged from 2.3 to 10.8cm with an average of 3.7cm.Two(11%)cases were with multiple lesions.The signal intensity of the eighteen lesions were similar to or slightly lower than that of muscles on T1WI;hyper-intense or slightly hyper-intense on T2WI and STIR images,but lower than that of fat tissue.Fifteen(83%)lesions showed stellate-shaped or ribbon areas of low signal intensity on both T1WI and T2WI,and one(6%)lesion with punctated hemorrhage.No cystic change or calcification was found in all the 18 cases.On enhanced MR images,the low-signal intensity areas on T1WI and T2WI in the lesions were not enhanced,while the rest of the lesions were enhanced homogeneously.Conclusion:MRI findings of planter desmoid tumors are of characteristics.MRI plays an important role in the diagnosis and differential diagnosis of planter desmoid tumor.

关 键 词：足底肿瘤 硬纤维瘤 磁共振成像 软组织肿瘤 

分 类 号：R445.2[医药卫生—影像医学与核医学] R738.6[医药卫生—诊断学]