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目的:探讨胸部孤立性纤维瘤(SFT)的CT表现,以提高对该病的认识.方法:回顾性分析25例经手术病理证实的胸部SFT的CT平扫及增强资料.结果:25例病变均为单发,23例起源于胸膜,2例起源于肺组织.病变的平均最大径为10.9 cm,呈圆形或类圆形,10(10/25)例有分叶,4(4/25)例有钙化,边界均较清楚.平扫CT上,6(6/9)例表现为不均匀密度肿块,3(3/9)例表现为均匀等密度肿块.增强后,大部分(15/21)肿块呈中度或明显不均匀性强化,类似“地图样”改变.14例肿块内部在动脉期可见明显强化的血管影,杂乱分布.8例内部见多发结节状强化,13例内见斑片状、囊状不强化区.以最大径10.0 cm为界值,不同大小SFT的部分CT表现有显著性差异(P＜0.05).结论:胸部SFT在CT上常表现为单发、体积巨大、边界清楚、包含多种密度的肿块,多发结节状强化及内部杂乱的血管影是其增强特征.“,”Objective:To investigate the CT findings of thoracic solitary fibrous tumors (SFT).Methods:CT images of 25 patients with thoracic SFT confirmed by surgery and pathology were retrospectively analyzed.Results:All cases had single le sion.Twenty-three lesions originated from the pleura,2 lesions from the lung.The mean diameter of the 25 lesions is 10.9 cm on CT images.All lesions presented as round or oval with well-defined margins,in which 10 cases (10/25) were lobulated,4 cases(4/25) had calcification.On plain CT,heterogeneous density was showed in 6 cases(6/9),and homogenous isodensity was showed in 3 cases(3/9).On contrast enhanced CT,unevenly moderate or intensive enhancement presented as “geographic pattern” was demonstrated in 15 cases (15/21).Disorganized vessels with obvious enhancement were showed in 14 masses during arterial phase.Multiple nodular enhancement was seen in 8 masses,pathy and cystic non-enhancement areas were seen in 13 cases.There are significant differences in some CT findings between different size of SFT (P＜0.05).Conclusion:Thoracic SFT usually presents as single,huge mass with well-defined margins and contains various components.Multiple nodular enhancement and inner vessels in disorder are the characteristics of thoracic SFT on contrast-enhanced CT images.