腰骶椎椎体后缘离断症的影像学表现

The Imaging features of Posterior Ring Apophysis Separation of Lumbar and Sacral Vertebra

目的:探讨腰骶椎椎体后缘离断症的CT、MR影像改变特点及在临床应用中价值。方法:回顾性分析45例腰骶椎椎体后缘离断症病例的影像学表现。其中35例完成多排螺旋CT扫描,10例完成核磁共振扫描。结果:该病的多排螺旋CT表现为:(1))腰骶椎椎体后缘局限性骨质缺损,缺损区边缘骨质硬化,(2))缺损区后方小骨块突入椎管,(3)可继发有椎管狭窄,硬膜囊及神经根受压。MRI主要表现包括:(1))椎体后缘不规则骨质缺损,(2)缺损区内可见椎间盘组织填充。结论:磁共振及多排螺旋CT对腰骶椎椎体后缘离断症的诊断都具有重要诊断价值,其中MSCT的价值要优于MRI。

Objective To study the imaging features of MSCT and MRI for posterior ring apophysis separation in lumbar and sacral vertebra Methods MSCT and MRI findings of 45 cases of posterior ring apophysis separation in lumbar and sacral were retrospectively analyzed.Results The major MSCT findings were:(1) a defect in the posterior margin of lumbar and sacral vertebral body with sclerotic margin;(2) posterior to the defect, a bony fragment was seen protruding into the spinal canal;(3) spinal canal stenosis, compression of dural sac and nerve root were seen. The MRI findings including(1) irregular defect in the posterior margins of vertebral body.(2) The signal of vertebral disc was found in the defect area.Conclusion MSCT and MRI have significant diagnostic value for posterior ring apophysis separation of lumbar and sacral vertebra.