腰椎体后缘软骨结节椎管狭窄的CT诊断

目的 :探讨腰椎后缘软骨结节 (LPMN)椎管狭窄的CT诊断价值。材料和方法 :回顾性分析 2 7例腰椎后缘软骨结节的临床及CT表现。结果 :LPMN的CT表现为 :( 1)椎体后上缘或下缘局限性骨缺损 ,缺损区周围骨质硬化 ;( 2 )缺损区后突入椎管内的骨块 ;( 3 )在矢状位上见骨块“翘起”征 ,缺损区呈“V”形或类三角形 ;( 4 )椎管狭窄 ,多伴有椎间盘突出。结论 :CT能明确诊断LPMN导致的椎管狭窄 ,并为手术治疗提供可靠依据。

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

Purpose:To study the diagnostic value of CT in the lumbar spinal canal stenosis caused by lumbar posterior marginal intraosseous cartilaginous node(LPMN). Materials and Methods: The manifestation of CT and clinical data of 27 cases with lumbar posterior marginal intraosseous cartilaginous node were analysed. Results:The CT features included: (1) focal bony defect in the posterior superior or posterior inferior edge of the affected vertebral body with sclerotic edge; (2 ) the defect foci which appeared the bony fragment sticking out the spinal canal; (3) on the sagittal plane,the bony fragment sticked up from the vertebral body edge which formed the shape of "V" or triangular; (4) lumbar spinal canal stenosis mostly with lumbar disk hemiation. Conclusion: CT examniation makes it possible to diagnose the lumbar spinal canal stenosis caused by lumbar posterior marginal intraosseous cartilagous node and provide valuabe information about type of operation.