天幕脑膜瘤的影像诊断与病理对照研究

Tentorial Meningioma:Comparative Study of Pathological Features with Imaging Findings

目的:探讨天幕脑膜瘤的影像学表现,并与组织病理学对照。方法:搜集病理证实的天幕脑膜瘤32例,全部病例行MRI检查,其中增强扫描22例。18例CT检查中,行增强扫描13例。分析所有CT及MRI图像,并与手术病理结果对照。结果:本组病例的主要病理为纤维型,亦可见上皮型、血管瘤型、血管母细胞型。15例脑膜瘤位于幕下,9例跨天幕生长,8例位于幕上。天幕脑膜瘤具有脑膜瘤的典型影像学表现,MRIT2WI上肿瘤信号与病理类型有关。结论:天幕脑膜瘤具有典型的影像学表现,CT和MRI具有诊断价值,MRI比CT更加优越。

Objective：To study the pathological features of the tentorial meningioma and the imaging features in CT and MRI. Methods： Thirty two patients with pathologically proved tentorial meningioma were examined by CT or MRI. Four men and twenty eight women, range from 34 - 75 years old with average age 55. 3. All patients were examined by MRI（twenty-two with enhanced scan）,eighteen patients by CT （thirteen with enhanced scan）. Compare the image features with pathological findings. Results： Pathologically, most were fibrous type,but epitheliated type,angiomatous type,or papillary type may also be seen. Fifteen were supratentorial,nine were supra/infratentorial,and eight were infratentorial. Tentorial meningioma had typical imaging features as common meningioma. The signal intensity related with the pathological type on T2 WI. Commonly marked and homogeneous enhancement could be seen, and dural tail sign presented in most cases. Some had ring like or inhomogeneous enhancement. A few had calcification, necrosis or hemorrhage. Conclusion： Tentorial meningioma has typical finding in imaging. CT and MRI are valuable examinations in diagnosis,and MRI is much better than CT.