鼻咽纤维血管瘤的CT和MRI诊断

目的探讨CT和MRI在诊断鼻咽纤维血管瘤中的应用价值。方法回顾性分析18例鼻咽纤维血管瘤的CT和MRI表现,对肿瘤的部位、密度或信号、范围及骨质改变进行分析。结果鼻咽纤维血管瘤多位于蝶腭孔区(16例/18例),CT上密度多均匀(6例/11例),MRI上信号强度不均匀(12例/14例),并可见血管流空信号影(14例/14例);增强MRI肿瘤明显不均匀强化(14例/14例)并显示肿瘤沿自然孔道与裂隙广泛累及周围结构。结论MRI可明确显示鼻咽纤维血管瘤的部位和范围且信号具有特征性,诊断价值优于CT。

CT and MRI Diagnosis of Nasopharyngeal Angiofibroma

Objective To investigate the value of CT and MRI in diagnosing nasopharyngeal angiofibromas.Methods 18 cases of nasopharyngeal angiofibromas were retrospectively analyzed including the location, density ,signal intensity, extension of tumors and changes of surrounding bones.Results 16 cases located in the area around sphenopalatine foramen. 6 cases exhibited homogeneous density on CT scans(6/11 cases) and 12 cases displayed inhomogeneous signal intensity on MR scans(12/14 cases). All the Fourteen MRI examinations revealed vice signal by vessels, inhomogeneous enhancement and extensive invasion along the foramina or fissures.Conclusion MRI not only determines the location and traces out the extension of nasopharyngeal angiofibroma more exactly, but also displayes its diagnostic signal fashion. Namely MRI has greater value in diagnosing this tumor than CT.