弥漫性特发性骨质增生症与后纵韧带骨化并存的影像学表现

Image manifestation of diffuse idiopathic skeletal hyperostosis (DISH) associated with ossification of the posterior longitudinal ligament(OPLL)

目的 :探讨弥漫性特发性骨质增生症 (DISH)与后纵韧带骨化 (OPLL)并存病例的影像学表现 ,以提高对其诊断能力。方法 :收集DISH与OPLL并存患者20例 ,男18例 ,女2例。年龄39～78岁 ,平均54.4岁。20例均行X线检查 ,其中1例行体层摄影 ,4例行CT扫描 ,5例行MRI扫描。结果 :DISH以脊椎前、外侧缘的骨化及脊椎以外韧带和肌腱插入部的增生为特征。后纵韧带骨化影像学表现为椎体后方带状高密度影 ,与椎体后缘之间有透亮间隙 ,有不同程度椎管狭窄。结论 :DISH与OPLL并存者可能具有因退变易发生异位骨化或钙化的素质。

Objective: To study the image manifestation of diffuse idiopathic skeletal hyperostosis(DISH) associated with ossification of the posterior longitudinal ligament(OPLL). Methods: 20 cases of DISH associated with OPLL including 18 males and 2 females were studied, age from 39～78 years, average 54.4 years.20 cases were performed X-ray plain films ,1 case were performed X-ray tomogram. 4 cases were performed CT scan. 5 cases were performed MRI scan.Results: DISH was characterized by bone proliferation along the anterior and lateral aspects of the spine and at extraspinal sites of ligament and tendon attachment to bone. The image manifestation of OPLL showed linear radiopaque strip paralleling the posterior vertebral body margins, a radiolucent zone is interspaced between the ossified ligament and vertebral body. There were different degrees spinal canal stenosis in OPLL cases. Conclusion: The study suggests the patients of DISH associated with OPLL may present an underlying ectopic ossifying or calcifying diathesis.It is very important to select the best examination.