Fig. 3.

Showing calcified ligamentous structures around the neural elements in the spinal canal: (a–b) Sagittal CT scan and MRI showing thick OPLL mass behind C6 vertebral body occupying about half of the spinal canal with cord signal changes; (c) Mid-sagittal CT scan image of thoracic spine showing ossified ligamentum flavum at multiple levels; (d) Axial CT scan images showing significant narrowing of the spinal canal; (e–f) Calcified L4-5, L5-S1 disc prolapsed. In all these patients there are high chances of dural tear during decompression.