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目的 分析腰椎后缘软骨结节的 CT表现并探讨其发病机制。方法 观察 2 5 12例腰椎间盘突出和其中49例腰椎后缘软骨结节 ,分析其临床和 CT表现特点。结果 腰椎后缘软骨结节好发年龄为 2 0～ 40岁 ,以 S1 和 L5 后上缘最常见 ,约占腰椎间盘突出病人的 2 %。软骨结节的形态以类圆形最多见 ,多有硬化边缘。裂隙形或边缘无硬化者可能为本病早期改变。软骨结节下多形成骨性突起 ,造成椎管矢状径变小 ;软骨结节常使椎体终板变形后膨 ,导致椎体侧隐窝狭窄。结论 腰椎后缘软骨结节与腰椎间盘突出相互促进 ,CT是本病较好的检查手段。
Objective To analyze the CT manifestations of lumbar trabecular cartilaginous nodules and to explore its pathogenesis. Methods A total of 2512 cases of lumbar disc herniation and 49 cases of lumbar posterior cartilaginous nodules were observed. The clinical and CT features were analyzed. Results The posterior margin of lumbar cartilage was well developed at the age of 20 ~ 40 years. The upper edge of S1 and L5 was the most common, accounting for 2% of patients with lumbar disc herniation. Cartilaginous nodules in the most common type of round, with more hardening edge. Fissure or edge hardening may be early changes in the disease. Cartilaginous nodules under the formation of bony protrusions, resulting in spinal canal sagittal diameter becomes smaller; cartilage nodules often deformed vertebral end plate deformation, leading to vertebral lateral recess stenosis. Conclusion The lumbar posterior margin of cartilage nodules and lumbar disc herniation promote each other, CT is a better examination of the disease means.