PMC3994691_01
(a) Preoperative flexion/extension MRI shows severe canal stenosis with myelopathy from C3 to C7 levels due to OLF. Canal stenosis aggravates within neck extension. Preoperative 3D reconstructed CT shows occified ligament flavum. (b) Postoperative MRI shows enlarged spinal canal on both flexion and extension image. 3D reconstructed CT image shows hemilaminectomy on C4, C5, C6 vertebrae with bilaterally decompressed by ULBD technique
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F6
C3 to C6 levels and central spinal canal stenosis from C4 to C6 levels with myelopathy due to ossification of ligament flavumm (OLF). Cervical dynamic (flexion-extension) MRI showed aggravation of canal stenosis by posterior pathology on extension [Figure 6a]. She underwent posterior Rt. side ULBD decompression with tubular retractor from C4 to C6 levels [Figure 6b].