Computed tomography (CT) and magnetic resonance imaging (MRI) reliably demonstrate
typical features of schwannomas or neurofibromas in the vast majority of dumbbell
lesions responsible for neural foraminal widening. However, a large variety of unusual
lesions which are causes of neural foraminal widening can also be encountered in the
spinal neural foramen. Radiologic findings can be helpful in differential diagnosis
of lesions of spinal neural foramen including neoplastic lesions such as benign/malign
peripheral nerve sheath tumors (PNSTs), solitary bone plasmacytoma (SBP), chondroid
chordoma, superior sulcus tumor, metastasis, and nonneoplastic lesions such as infectious
process (tuberculosis, hydatid cyst), aneurysmal bone cyst (ABC), synovial cyst, traumatic
pseudomeningocele, arachnoid cyst, vertebral artery tortuosity. In this article, we
discuss CT and MRI findings of dumbbell lesions which are causes of neural foraminal
widening.
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© 2009 Published by Elsevier Inc.
