椎管内脊膜瘤的MRI诊断  

MRI Diagnosis of Intraspinal Meningioma

作　　者：杨兴亮[1] 延晓勇 张博[1] 

机构地区：[1]榆林市第一医院影像科,绥德718000

出　　处：《现代医用影像学》2009年第5期277-279,共3页Modern Medical Imageology

摘　　要：目的:探讨椎管内脊膜瘤的MRI诊断及鉴别诊断。材料与方法:回顾性分析16例经手术和病理证实的椎管内脊膜瘤,观察其发病部位、边缘形态、信号特点、邻近结构情况及增强表现。结果:16例患者,男6例,女10例,年龄16-68岁,平均47岁。发病部位依次为上胸段8例、颈段6例、胸腰段2例,腰段1例,15位于髓外硬膜下,1例同时累及髓外硬膜内、外。髓外硬膜下脊膜瘤9例呈半圆形,6例呈椭圆形,脊髓受压移位,15例位于硬膜外肿瘤均可见"硬膜下"征;1例同时累及髓外硬膜内、外的脊膜瘤呈不规则形。于T1加权像呈等信号6例,略低信号7例,等、低混杂信号3例;T2加权像呈等信号5例.略高信号10例,等、高混杂信号1例。注射Gd-DTPA后14例呈较均质性强化,2例呈不均质性强化,可见"硬膜尾"征。结论:MRI能够对椎管内脊膜瘤较准确定位;根据肿瘤的信号特点、肿瘤与硬脊膜的关系及强化特点,一般能够达到术前定性诊断。Purpose： To investigate the MRI diagnosis and differential diagnosis of intraspinal meningioma. Materials and Methods： 16 patients with surgical pathologically confirmed intraspinal meningioma were retrospectively studied. Observe the location, shapes of edge, MR signal speciality, circum - structures and MR - enhancement appearances. Results： A-mong the 16 eases, 6 were males, 10 were females, ages range from 16 -68 years old, mean age was 47 years old. 8 lesions of intraspinal meningioma occurred in the upper thoracic segments, 6 lesions in the cervical segments, 2 lesions in the thoracic -lumbar segments, 1 lesion in the lumbar segments; 15 lesions located in Spinal extradura, 1 lesions located in intra - and extra - dura; 9 lesions located extra - medulla and subdural. 9 lesions were hemicycle, 6 lesions were ovoid, spinal cord was compressed and displaced. 15 lesions located Spinal extradural showed the sign ofspinal sub dura＇. 1 lesion located in intra -and extra -dura had unregular shape. OfaU the eases in TIWI, 6 were iso -signal; 7 were slightly hypo-signal; 3 were iso- and hypo- signal. In T2WI, 5 were iso- signal; 10 were slightly hyper- signal; 1 were iso- and hyper- signal. 14 leisions were homogenous enhancement; 2 lesions were hetergenous enhancement after injected Gd - DTPA, and with the sign of＂ dural tail sign＂. Conclusion： MRI can pinpoint the location of meningioma, and based on MR signal speciality, correlation between tumor and spinal dural mater, enhancement speciality, meningioma could be qualitily diagnosed befor operation.

关 键 词：椎管 脊膜瘤 MRI 诊断 

分 类 号：R739.4[医药卫生—肿瘤]