腹盆腔孤立性纤维瘤的影像学特征

Imaging Characteristics of Pelvic and Abdominal Solitary Fibrous Tumor

目的:分析盆腔孤立性纤维瘤(SFT)的计算机断层扫描(CT)和磁共振成像(MRI)结果,并分析其与病理的相关性。方法:回顾性分析6例经组织病理学证实的盆腔SFT病例。分析造影增强前后各病变的形态、大小、数目、边缘、衰减或强度等图像特征,并与肿瘤病理形态学进行比较。结果:6例患者中,未增强CT图像显示3例为异质性肿块,内有斑片状变性坏死灶,1例为匀质肿块。对比增强的CT图像显示在第1和第2号病人中的斑片状低密度区域存在显著的异质增强。MRI T2检测发现病灶为异质性混合强度1例;高低信号相伴1例。T1加权检测发现斑片状高信号、不规则低信号1例,信号明显均匀增强1例。结论:盆腔SFT的放射学表现是多样的,并且其多样性与组织病理学特征相关。

Objective: To analyze the computed tomography(CT) and magnetic resonance imaging(MRI) findings of pelvic solitary fibrous tumors(SFT) and its correlation with pathology. Methods: 6 cases of pelvic SFT confirmed by histopathology were analyzed retrospectively. Image characteristics such as shape, size, number, edge, attenuation or intensity for each lesion before and after contrast enhancement were analyzed and compared with the pathomorphology of the tumors. Results: Unenhanced CT images showed heterogeneous masses with patchy, necrotic foci in 3 cases, while a homogeneous mass in 1 case. Contrast enhanced CT images showed marked, heterogeneous enhancement with patchy hypodense areas in the first and second cases. MRI T2-weighted images showed heterogeneous mixed intensity lesion with more hypointense areas in 1 case and mostly hyperintensity with hypointense foci in the other case. Contrast-enhanced T1-weighted images demonstrated heterogeneous enhancement that mostly comprised patchy hyperintense and irregular hypointense lesions in 1 case and marked homogeneous enhancement in the other case. Conclusion: Radiological findings of pelvic SFT are variable and correlate with the variable histopathological features.