Case Report Circumferential intradural meningioma of the thoracic spinal cord

BACKGROUND AND CONTEXT: There are very few reported cases of a meningioma circumferentially surrounding the spinal cord. To date, this entity has only been described at the conus medullaris and in the cervical cord. Herewith, the authors describe a case of an intradural extramed- ullary meningioma that completely encircled the thoracic spinal cord. CASE REPORT: A 40-year-old woman with progressive numbness of the lower limbs and spas- ticity of gait following a fall presented to our hospital. Magnetic resonance imaging of the spine demonstrated an abnormality at T6-T7 completely encircling the spinal cord. The patient under- went a T6-T8 laminectomy and subtotal resection of the intradural partially calcified lesion. Resection of the anterolateral portion was not feasible. Histology revealed psammomatous meningioma (WHO Grade 1). The patient recovered well and was discharged with improved gait but some residual numb- ness of her feet and right hemithorax. CONCLUSION: This is the first reported case of an intradural extramedullary meningioma com- pletely encircling the thoracic spinal cord. Achieving complete resection of this circumferential meningioma was not possible via a posterior approach. The optimum management of this condition is unknown; clearly, achieving symptomatic relief with adequate cord decompression is paramount; however, the long-term outcome and risk of recurrence in these cases, given their rarity and the dif- ficulties in achieving complete resection, is unknown. © 2016 Elsevier Inc. All rights reserved.