• Clinical imaging · Sep 2006

    Magnetic resonance imaging of the lumbar spine after epidural and nerve root injection therapy: evaluation of soft tissue changes.

    • Thomas von Rothenburg, Robert Drescher, Odo Koester, and Gebhard Schmid.
    • Department of Radiology and Nuclear Medicine, St. Josef Hospital, University Hospital, Gudrunstrasse 56 44712 Bochum, Germany.
    • Clin Imaging. 2006 Sep 1;30(5):331-4.

    ObjectiveMagnetic resonance imaging (MRI) was performed to evaluate soft tissue changes after nerve root and epidural injections in lumbar spine in patients with radiculopathy.Materials/MethodsPatients underwent a multiple-shot injection protocol to nerve root/epidural space. The MRI protocol included T1-weighted, T2-weighted, STIR, and contrast-enhanced, fat-saturated T1-weighted sequences before and after treatment.ResultsIn all treated patients, a diffuse wedge-shaped edema in paravertebral tissues with a slight contrast enhancement was seen. Two small hematomas in the paravertebral muscle were noted. No changes in the epidural space, the abscess, or a lipodystrophy in epidural/nerve root space occurred.ConclusionNormal tissue changes after injection therapy of lumbar radiculopathy include wedge-shaped tissue edema at the injection level. In a minority of patients, small hematomas may occur.

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