脊柱转移瘤的MRI诊断(附34例分析)

MRI diagnosis of spinal metastatic tumors (analysis of 34 cases)

目的 :探讨MRI对脊柱转移瘤诊断和鉴别诊断的价值。方法 :回顾性分析 3 4例脊柱转移瘤的MRI表现 ,均有明确原发瘤灶。结果 :① 6例为单椎体病变 ,2 8例为多椎体病变 ;②在T1 WI上 3 4例均呈低信号 ,在T2 WI上 2 6例( 76.5 %)呈高信号 ,7例 ( 2 0 .6%)呈等信号 ,1例 ( 2 .9%)呈低信号 ;③椎体骨质破坏分溶骨型、成骨型、混合型三种类型 ;④椎旁肿块形成者 7例 ( 2 0 .6%) ;⑤椎管狭窄者 13例 ( 3 8.2 %) ;⑥跳跃式分布者 2 0例 ( 5 9.9%) ;⑦ 3 4例椎间盘的形态及信号均大致正常。结论 :脊柱转移瘤具有特征性的MRI表现 。

Objective:To study the value of MRI in diagnosis and differential diagnosis of spinal metastatic tumor.Methods:The MRI appearances of 34 cases of spinal metastatic tumor were retrospectively analyzed.Results:①of 34 cases,single vertebra was involied in 6 cases,and multiple vertebrae were involved in 28 cases;②The lesions were all hypointense on T 1WI.On T 2WI,26 cases appeared hyperintense,7 isointense and one hypointense;③The invasion of vertebra could be divided into 3 types:osteolytic,osteoblastic and mixed type;④In 7 cases a paravertebral mass was observed;⑤There was narrowing of the spinal canal in 13 cases;⑥The 'jump over' sign occurred in 20 cases;⑦The intervertebral disks were normal in all 34 cases.Conclusion:The spinal metastatic tumor has characteristic features on MRI.Careful and comprehensive analysis is helpful in diagnosis and differential diagnosis.