孤立性纤维性肿瘤CT与MRI表现  

CT and MRI Findings of Solitary Fibrous Tumor

作　　者：金丹[1] 龚建平[1] 赵海峰[2] 刘伟[1] 钱铭辉[1] 

机构地区：[1]江苏省苏州大学附属第二医院放射科,215004 [2]江苏省苏州大学附属第二医院病理科,215004

出　　处：《临床放射学杂志》2015年第10期1686-1690,共5页Journal of Clinical Radiology

摘　　要：目的探讨孤立性纤维性肿瘤（SFT）的CT与MRI特征。方法回顾性分析经手术病理证实的10例SFT的CT与MRI资料,将CT与MRI表现与手术病理结果对照观察。结果 （1）10例SFT中,3例位于胸部,1例位于颅内,4例位于腹盆腔,2例位于体表软组织;其中3例病理学诊断为恶性。肿瘤最大径1.5～21.8 cm。瘤体大多为实性,边缘清楚,多呈不规则形,少数边缘分叶状。（2）6例行CT扫描,瘤体密度均匀/混杂,部分伴有点状钙化及小片状出血;增强扫描呈明显均匀或不均匀＂快进慢出＂型强化,肿瘤血管多见。（3）4例行MRI扫描,T1WI上多呈不均匀等低信号,T2WI上呈以高信号为主的混杂信号,增强扫描呈明显不均匀强化;1例呈现多房囊样肿瘤的信号特点。（4）显微镜下肿瘤由疏密不均的梭形细胞、致密胶原间质以及大量薄壁血管组成。结论 SFT是一种可发生于全身各部位的梭形细胞肿瘤,确诊仍依靠病理学及免疫组织化学检查,影像学检查尤其CT扫描具有一定特征性。Objective To explore CT and MRI findings of solitary fibrous tumor. Methods This study included 10 cases with SFT proved by pathological results. The imaging manifestations were retrospectively reviewed and analyzed in comparison with surgical and pathological results. Results（ 1） SFTs were located in the thoracic cavity（ 3 /10）,cerebral（ 1 /10）,abdominal and pelvis（ 4 /10）,and somatic soft tissues（ 2 /10）. Three cases were malignant among them. The tumors ranged from 1. 5 to 21. 8 cm in maximum diameter. Most of the tumors were solid,with well-defined contours. Half of the tumors were irregular,some were lightly lobulated.（ 2） 6 patients underwent CT scan. The density of tumors was uniform or mixed,part of them had calcification and hemorrhagic foci. On enhanced scan,the tumors showed evenly or unevenly＂quick enter slow out＂enhancement with multiple vessel.（ 3） 4 patients underwent MRI. Most of the tumors presented intermediate to low signal on T1 WI,and mixed hyperintense signal on T2 WI. The tumors were enhanced indifferent degree on enhanced T1 WI. 1 patient showed multilocular cystic neoplasm.（ 4） Histologically,SFTs were composed of juxtaposed hyper-and hypo-cellular spindle cells,dense collagenous stromas and numerous thin-walled blood vessels. Conclusion Solitary fibrous tumor is a rare spindle cell tumor,which can occur in various locations. The final diagnosis depends on histopathological and immunohistochemical findings of the tumors,imaging findings especially CT are characteristic.

关 键 词：孤立性纤维性肿瘤 体层摄影术 X线计算机 磁共振成像 

分 类 号：R730.44[医药卫生—肿瘤] R445.2[医药卫生—临床医学]