低场MRI在椎管内脊膜瘤诊断中的临床应用
Journal of Modern Oncology(2012)
Abstract
目的:探讨低场磁共振对椎管内脊膜瘤的MRI诊断及鉴别诊断.方法:回顾性分析23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、与邻近结构关系及增强表现.结果:23例患者中,男9例,女14例,年龄14-71岁,平均48岁.好发部位依次为上胸段、颈段、胸腰段,腰段,髓外硬膜下,髓外硬膜内外.22例肿瘤形态规则,呈半圆形,椭圆形,脊髓受压移位,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.18例平扫T1WI呈等、略低信号,5例呈等、低混杂信号,18例T2WI呈等、略高信号,5例呈等、高混杂信号.注射Gd-DTPA后18例呈较均匀强化,5例呈不均匀强化,22例可见“硬膜尾”征.结论:低场MRI能够对椎管内脊膜瘤较准确定位、定性诊断,对外科手术治疗有指导意义.
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