PMC7656023_01
Sagittal T2-weighted (a) and sagittal T1-weighted (b) MRI showed a longitudinally oriented mass-like lesion in the anterior epidural space (arrow). The mass presented with high signal intensity on T2-weighted images and medium/high signal intensity on T1-weighted images. Axial T2-weighted (c and d) and axial T1-weighted (e) MRI showed that the dural sac was compressed by the ventral mass.
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F1
It markedly compressed both the cauda equina and anterior L5 and S1 nerve roots [Figure 1].
Sagittal T1-weighted and T2-weighted (a and b) MRI showed the complete removal of the herniated lumbar disk and no residual signs of the preoperative longitudinally oriented mass-like lesion in the anterior epidural space. Axial T2-weighted (c) MRI showed neither dural sac nor nerve compression.
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F2
The postoperative lumbar MRI confirmed adequate canal decompression without any further lesions being identified [Figure 2].