腰椎椎体后缘骨内软骨结节所致腰椎管狭窄症的影像诊断

目的　总结腰椎椎体后缘骨内软骨结节 (LPMN)所致腰椎管狭窄症临床、影像诊断 ,探讨有关的发病因素。方法　对经手术证实的 16例PLMN所致腰椎管狭窄症的临床表现、影像学特征、手术方式进行回顾性分析总结。结果　典型的影像改变为 :( 1)椎体后上缘类圆形骨质缺损 ,边缘较致密硬化 ;( 2 )缺损后方有一骨块突入椎管 (游离或部分与椎体相连 ) ;( 3)硬膜囊及神经根受压 ,可伴有椎间盘突出。结论　影像学检查能明确诊断腰椎椎体后缘骨内软骨结节 (LPMN)所致腰椎管狭窄症 ,并为制订治疗方案提供可靠依据。

Imaging Diagnosis of Lumbar Spinal Canal Stenosis Caused by Lumbar Posterior Marginal Intraosseous Cartilaginous Node

Objective To summarize the image diagnosis and treatnent of lumar spinal canal stenosis caused by lumbar posterior marginal intraosseous cartilaginous node(LPMN)and discuss its ralated pathogenic factors.Methods 16 cases of lumbar spinal canal stenosis caused by LPMN undergone susgical treatmeut from 1989 to 1999 were reviewed.Results The typical imaging findings included:(1)a defect in the posterior superior margin of the affected vertebral body,with sclerotic margin;(2)posterior to the defect,a bony fragment was seen protruding into the spinal canal;(3)compression of the dural sac and nerve root.Conclusion Imaging examniation can provide reliable evidence for diagnosis of lumbar spinal canal stenosis caused by lumbar posterior marginal intraosseous cartilagous node and is help planning treatment protocol.