Department of Radiology, Seoul National University Bundang Hospital, Seongnam 463-707, Korea.
Korean J Radiol. 2014 Nov-Dec;15(6):733-8. doi: 10.3348/kjr.2014.15.6.733. Epub 2014 Nov 7.
We report magnetic resonance imaging (MRI) findings on focal anterior displacement of the thoracic spinal cord in asymptomatic patients without a spinal cord herniation or intradural mass.
We identified 12 patients (male:female = 6:6; mean age, 51.7; range, 15-83 years) between 2007 and 2011, with focal anterior displacement of the spinal cord and without evidence of an intradural mass or spinal cord herniation. Two radiologists retrospectively reviewed the MRI findings in consensus.
An asymmetric spinal cord deformity with a focal dented appearance was seen on the posterior surface of the spinal cord in all patients, and it involved a length of 1 or 2 vertebral segments in the upper thoracic spine (thoracic vertebrae 1-6). Moreover, a focal widening of the posterior subarachnoid space was also observed in all cases. None of the patients had myelopathy symptoms, and they showed no focal T2-hyperintensity in the spinal cord with the exception of one patient. In addition, cerebrospinal fluid (CSF) flow artifacts were seen in the posterior subarachnoid space of the affected spinal cord level. Computed tomography myelography revealed preserved CSF flow in the two available patients.
Focal anterior spinal cord indentation can be found in the upper thoracic level of asymptomatic patients without a spinal cord herniation or intradural mass.
我们报告了在无脊髓突出或硬脊膜内肿块的无症状患者中，胸段脊髓局部前移位的磁共振成像（MRI）表现。
我们在 2007 年至 2011 年间共发现 12 例（男：女=6：6；平均年龄 51.7 岁；范围 15-83 岁）患者存在脊髓局部前移位，且无硬脊膜内肿块或脊髓突出的证据。两名放射科医生进行了回顾性共识评估。
所有患者的脊髓后表面均可见不对称性脊髓畸形，表现为局部凹陷，病变长度为 1 或 2 个胸椎（胸椎 1-6）。此外，所有病例均观察到局部后蛛网膜下腔增宽。所有患者均无脊髓病症状，除 1 例患者外，脊髓内未见局灶性 T2 高信号。此外，受影响脊髓水平的后蛛网膜下腔可见脑脊液（CSF）流动伪影。在 2 例可进行的患者中，脊髓造影计算机断层扫描显示 CSF 流动正常。
无脊髓突出或硬脊膜内肿块的无症状患者，在胸段上段可出现脊髓局部前凹陷。
