PMC4244769_01
Sagittal and axial T2-weighted preoperative MR imaging of this patient's lumbar spine. (a) L3-L4 level, (b) L4-L5 level, (c) L5-S1 level
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F1
L3 and L4 resulting in severe spinal canal stenosis, with no stenosis at L5-S1 [Figure 1]. Lumbar flexion and extension imaging demonstrated no evidence of increased subluxation despite the grade I spondylolisthesis. Due to a small left L4-L5 disc hernation on MRI [Figure 1b], a left L4-L5 microdiscectomy was performed as well.
Sagittal and axial T2-weighted postoperative MR imaging of this patient's lumbar spine. (a) L3-L4 level, (b) L4-L5 level
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F2
This was consistent with the decompression visualized on postoperative MRI [Figure 2].