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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 28:590-592, March 2007
© 2007 American Society of Neuroradiology

Case Report
SPINE

Idiopathic Hypertrophic Spinal Pachymeningitis: Report of Two Cases with Typical MR Imaging Findings

S. Pai^a, C.T. Welsh^b, S. Patel^a and Z. Rumboldt^c

^a Department of Neurosurgery, Medical University of South Carolina, Charleston, SC
^b Department of Pathology, Medical University of South Carolina, Charleston, SC
^c Department of Radiology, Medical University of South Carolina, Charleston, SC

Address correspondence to Zoran Rumboldt, MD, Medical University of South Carolina, Department of Radiology, 169 Ashley Ave, PO Box 250322, Charleston, SC 29425; e-mail: rumbolz{at}musc.edu

SUMMARY: Two patients with a chronic progressive myelopathy were successfully surgically treated and idiopathic hypertrophic spinal pachymeningitis (IHSP) was found on histology. In both patients, an extensive extramedullary mass of low T2 signal with peripheral contrast enhancement was compressing the spinal cord on MR imaging. This imaging appearance in patients with chronic progressive myelopathy should suggest the diagnosis of IHSP.