腹部孤立性纤维瘤的影像学诊断

目的：探讨腹部孤立性纤维瘤（SFT）影像学及病理学特征。方法：回顾性分析了6例腹部孤立性纤维瘤病例的CT和MRI表现以及病理组织学和免疫组织化学变化。结杲：CT显示肿块边界清楚，增强扫描因肿瘤富于血管通常早期呈明显均质性强化。MR扫描显示肿瘤实质在T1WI、T2WI多呈低信号，但肿瘤因黏液样变性或出血在T2WI呈高信号。病理学检查：肿瘤由梭形细胞构成，有多种排列方式，免疫组化CD34阳性。结论：SFT是一种间叶源性、境界清楚的软组织肿瘤，影像学上因病理学上肿瘤细胞分布以及有无黏液样变性而呈现不同的改变及强化模式。

Imaging diagnosis of abdominal solitary fibrous tumor

Objective: To investigate the imaging characteristics of abdominal solitary fibrous tumor(SFT) with its pathological features.Methods: Six cases of abdominal solitary fibrous tumors were studied using X-ray,CT,MRI examination as well as histopathological and immunohistochemical techniques.Results: Contrast enhanced CT showed early intense enhancement as a result of the rich vascularization.On MRI the parenchyma of the tumors showed hypointensity on T_1WI,T_2WI and some tumors might manifest areas of hyperintensity on T_2WI due to myxoid degeneration or hemorrhage.Microscopically,SFT was composed of spindle cells with various patterns and these spindle cells were CD34 positive on immunohistochemistry.Conclusion: SFT is a soft tissue tumor originating from mesenchyma.Abdominal SFT shows variable appearance and enhancement pattern on CT and MRI according to tumor cells distribution and myxoid degeneration or hemorrhage within the tumor pathologically.