Lehman V T, Murthy N S, Diehn F E, Verdoorn J T, Maus T P
Mayo Clinic College of Graduate Medical Education, Department of Radiology, Mayo Clinic, 200 First St SW, Rochester, MN 55905, USA.
Mayo Clinic College of Graduate Medical Education, Department of Radiology, Mayo Clinic, 200 First St SW, Rochester, MN 55905, USA.
Clin Radiol. 2015 May;70(5):528-35. doi: 10.1016/j.crad.2014.12.009. Epub 2015 Jan 7.
The retrodural space of Okada is situated dorsal to the ligamentum flavum in the interlaminar space, and provides communication between contralateral facet joints. MRI will often demonstrate heterogeneous signal abnormality with contrast enhancement in this space and several communicating compartments of the posterior ligamentous complex: bilateral facet joints, adventitial interspinous bursae, or retrodural cysts penetrating the ligamentum flavum. Pars interarticularis defects are frequently present. This imaging pattern may be associated with axial low back pain and/or radicular pain. Recognition of this pattern at MRI has distinct implications for image interpretation, unifying prior reports of involvement of individual components of the posterior ligamentous complex. Its recognition will also affect planning for therapeutic interventional pain procedures. We refer to this constellation of imaging and clinical findings as posterior ligamentous complex inflammatory syndrome (PLCIS).
冈田氏硬膜后间隙位于椎板间隙的黄韧带背侧，为对侧小关节之间提供连通。MRI常显示该间隙及后韧带复合体的几个连通腔室（双侧小关节、棘突间外膜滑囊或穿透黄韧带的硬膜后囊肿）出现不均匀信号异常并伴有强化。峡部裂缺损也很常见。这种影像学表现可能与轴向性下腰痛和/或神经根性疼痛有关。在MRI上识别这种表现对图像解读具有独特意义，统一了先前关于后韧带复合体各个组成部分受累的报告。其识别也会影响治疗性介入性疼痛程序的规划。我们将这种影像学和临床发现的组合称为后韧带复合体炎症综合征（PLCIS）。
