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Posterior epidural migration of a sequestrated lumbar disc fragment: MRI findings.

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Fig. 2. Preoperative view of the dural sac after L5 laminectomy showed extracted disk fragment with yellowish appearance and attachment to the posterior dural sac.
Fig. 3. Lumbar CT scan in the second case showed left lateral herniated disk at L5-S1 (A) and posteriorly located mass, which appears isodense to the intervertebral disk (B).

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