孤立性纤维性肿瘤的CT和MRI表现  

CT and MRI Findings of Solitary Fibrous Tumors

作　　者：李金环[1] 钱银锋[1] 张婧婧[1] 陆璐[1] 张诚[1] 

机构地区：[1]安徽医科大学第一附属医院放射科,230022

出　　处：《临床放射学杂志》2015年第5期715-719,共5页Journal of Clinical Radiology

摘　　要：目的探讨孤立性纤维性肿瘤（SFT）的CT和MRI表现,以提高对本病的认识。方法回顾性分析经病理及免疫组织化学证实的21例SFT的CT及MRI表现。13例行CT检查,其中10例行增强扫描;7例行MRI检查,4例行增强扫描;1例行CT、MRI平扫及CT增强扫描。结果 21例均为单发病灶,其中肿瘤位于胸部10例,腹部4例,颈面部3例,颅内2例,椎管内1例,眼眶1例。肿瘤最大径1.5--30.0 cm,平均9.9 cm。体积较小者呈椭圆形或圆形,体积较大者呈分叶状或不规则状。CT表现：肿瘤实质呈与肌肉相似的等密度,8例内见斑片状囊变坏死区,1例肿瘤内见条状钙化,3例伴出血;MRI表现：肿瘤实质在T1WI上呈等信号,T2WI上3例呈等信号或稍低信号,4例呈高信号,1例呈等高混杂信号,4例肿瘤内见囊变。增强表现：10例呈不均匀性强化,其中7例强化呈＂地图＂样;7例肿瘤内或周边可见明显强化的迂曲血管。结论 SFT的CT及MRI表现有一定的特征性,提高对本病的认识有助于术前的正确诊断。Objective To investigate CT and MRI findings of solitary fibrous tumors （SFT） in order to make a further understanding of the disease. Methods CT and MRI findings in 21 patients with SFT that was proved by pathology and immunohistochemistry were retrospectively analyzed. Plain CT scan was performed in 13 patients, among them additional enhanced CT scan was employed in 10. MRI was carried out in 7 patients, among them additional enhanced MRI was a- dopted in 4. Plain MRI and both plain and enhanced CT scan were used in one patient. Results The lesion was single in all 21 patients. The lesions were located in chest （n = 10）, abdomen （n =4）, facial and neck region （n =3）, intra-cra- nium （ n = 2）, spinal canal （ n = 1 ） and orbital cavity （ n = 1 ）. The maximum diameters of the tumors ranged from 1.5 cm to 30.0 cm with a mean of 9.9 cm. The small tumors were oval or round in shape ; and the large tumors were lobulated or irregular in shape. On CT scans, the lesion showed iso-density same as the muscles; patch cystic degeneration and necrosis was seen in 8 patients; strip calcification was observed in one patient; and hemorrhage was found in 3 patients. On MRI, the solid tumors presented as iso-intensity on T1WI, as iso- or slight hypo-intensity on T2WI in 3 patients, as hyper-intensi- ty on T2WI in 4 patients, or as mixed intensity on T2WI in one patient. Cystic degeneration within the tumor was observed in 11 patients. After contrast injection, the tumor showed inhomogeneous enhancement in 11 patients, among them ＂map＂ like enhancement pattern was seen in 7. Obvious enhanced tortuous vessels within or around the tumor were demonstrated in 7 patients. Conclusion Solitary fibrous tumors have certain CT and MRI features, which are very helpful for further un- derstanding of this disease and in correctly making preoperative diagnosis.

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：R730.262[医药卫生—肿瘤]