PMC5742913_01
The axial T2-weighted MRI showed an extradural posteriorly migrated disc fragment at the L3-L4 level. Note the separation between the disc and the overlying dural sac
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F1
L4/L5 level (complete motor, reflex, and sensory loss). Lumbar magnetic resonance (MR) showed a compressive ventral extradural lesion at the L3-L4 level that was iso/hypo intense on T1 and hyperintense on the T2 studies, consistent with an acute disc herniation [Figure 1].
PMC5742913_02
Saggital T2 MRI image showing the extradura, posteriorly migrated disc fragment at the L3-L4 level
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F2
The MR imaging scan showed a large ventral disc herniation at the L3-4 level resulting in marked thecal sac compression [Figure 2].
PMC5742913_03
Saggital T2 contrast MRI image showing the extradural L3-L4 posteriorly migrated disc fragment. Note the lesion/disc herniation enhanced with contrast
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F3
MR imaging showed a well-defined posterior extradural L3-L4 lesion that was hypointense on T1 and hyperintense on T2-weighted studies with accompanying central hypointensity; all findings were consistent with a disc herniation [Figure 3].
Intraoperative photograph at the L3-L4 level following a laminectomy showing a large ventral disc fragment
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F4
All three patients underwent L3 laminectomy and L3-4 discectomy without fusion [Figure 4].