摘要
目的:探讨脊膜瘤的MRI表现特征及临床意义。材料和方法:搜集并分析术前行MRI检查且经手术和病理证实的脊膜瘤16例,观察肿瘤部位、数目、瘤体信号表现及邻近硬脊膜改变,瘤髓交界带的MRI信号及增强后的MRI表现特征。结果:位于上、中胸段14例,颈段2例。肿瘤信号不均者6例。全部病例均未见囊变及出血,肿瘤邻近硬脊膜增厚1例,瘤体均有一定的增强特征。结论:脊膜瘤多位于硬膜下间隙、脊髓侧方,单发多见且无囊变、出血。肿瘤信号不均匀的主要原因是钙化。瘤髓交界带T2WI呈低信号时,肿瘤与脊髓可能存在粘连。脊膜瘤可引起硬膜增厚。Gd-DTPA增强具有明显均一的特征。
Objective:To study the characteristic MR features of spinal meningioma and its clinical significance.Materials and Methods:MRI findings of 16 cases of spinal meningioma proved by operation and pathology were reviewed.The location,number,MR signal intensity and anatomic interface between the tumor and the adjacent spinal cord and the change of the dura were analysed.Results:The upper and middle thoracic spine were involved in 14 cases and the cervical spine in two cases.Heterogeneous signal intensity was present in six cases.No cyst and hemorrhage were found within the tumor in all of the cases.Thickened dura adjacent to the tumor was found in one case.Contrast enhanced (CE) scans showed some characteristic enhancement features.Conclusion:Most spinal meningiomas arise in the subdural space and the side of the spinal cord and often appear as a single lesion without cystic degeneration and hemorrhage.The heterogenous signal intensity of the tumors is mainly caused by calcification.The low signal intensity on T2WI between the anatomic interface of the tumor and cord may be an indication of adhesion.CE enhancement is helpful in differential diagnosis.The spinal meningiomas can cause dural thickening.
出处
《中国临床医学影像杂志》
CAS
2001年第6期430-432,共3页
Journal of China Clinic Medical Imaging
