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  • Title: Intradural lumbar disk fragment with ring enhancement on MR.
    Author: Wasserstrom R, Mamourian AC, Black JF, Lehman RA.
    Journal: AJNR Am J Neuroradiol; 1993; 14(2):401-4. PubMed ID: 8456719.
    Abstract:
    Intradural extension of a herniated intervertebral disk, an unusual complication of a common disease, may mimic an intradural tumor on MR. A case of a pathologically proved subdural disk fragment is presented; MR findings that suggested the correct diagnosis were: proximity of intervertebral disk disease; whorl-like mixed intensity on T2-weighted images; poor visualization of the mass on unenhanced T1-weighted images; and marked ring enhancement following administration of gadolinium.
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