PMC4533435_01
Lumbar magnetic resonance imaging shows a giant, inferiorly migrated, sequestered disc fragment at the right L3-4 level.
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F1
Magnetic resonance imaging (MRI) of the lumbar spine showed a giant, inferiorly migrated, sequestered disc fragment at the right L3-4 level and a disc herniation at the left L4-5 and left L5-S1 levels (Fig. 1).
Air densities are seen anterior to the brain stem and Meckel cave cisterns simulating an air cisternogram with discernible trigeminal nerves in the lung window settings. Air can be seen also in brain window settings.
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F2
Cranial computed tomography (CT) revealed pneumocephalus involving the suprasellar and basal cisterns (Fig. 2).
Sagittal reformation of the postoperative lumbar computed tomography in soft tissue window (left) and transverse cut from the L4 level at lung window (right) showing air densities in L3-4 intervertebral space, anterior-right to the dural sac, and in the posterior extradural regions.
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F3
Additionally, lumbar CT revealed pneumorrhachis at the L4 level (Fig. 3).