鼻咽部纤维血管瘤的影像学诊断

Imaging Findings of the Nasopharyngeal Fibroangioma

目的探讨鼻咽部纤维血管瘤(nasopharyngeal fibroangioma)的影像学特征性表现及其诊断价值。方法回顾性分析52例鼻咽部纤维血管瘤的临床资料、CT及MRI表现,分析病变的部位、形态、大小、边界光整与否、侵犯范围、密度或信号、强化方式、骨质变化及邻近结构的改变。结果鼻咽部纤维血管瘤以浸润性生长特点为主,可引起邻近骨质的压迫塑形或骨质吸收破坏改变。CT平扫以等或稍低密度为主,MRI以等或稍长T1、等或稍长T2信号为主;增强扫描瘤体多表现为显著均匀性强化。MRI显示瘤体内可见点条状血管流空信号影,形成典型的"椒盐征"。结论 CT结合MRI对鼻咽部纤维血管瘤的术前诊断、定位及预后评估有重大指导意义。

Objective To explore the imaging findings and diagnostic value of the nasopharyngeal fibroangioma.Meth-ods The clinical data,CT findings and MRI findings in 52 patients with nasopharyngeal fibroangioma were retrospectively ana-lyzed.The location,shape,size,boundary,scope,density or signal,strengthen and the changes of the adjacent structure of the mass were observed.Results The nasopharyngeal fibroangioma mainly showed invasive growth,and leaded to oppressive shape or ab-sorption of the adjacent bone.The nasopharyngeal fibroangioma mainly showed equal or lower density on CT images,and showed equal or slightly longer T1,and equal or slightly longer T2 on MRI images.The tumor showed uniform and obviously strengthening after administration of Gd-DTPA.The punctate and bar empty blood flow signals were seen in the tumor on the MRI images,which shows a typical sign of salt and pepper.Conclusion The combination of the CT and MRI have important clinical values in the diagnosis,localization and evaluation of the prognosis of the nasopharyngeal fibroangioma.