A 7-year-old boy presented to the neurosurgery clinic with left leg weakness. Enhanced multidetector computed tomography and magnetic resonance imaging were performed. Multidetector computed tomography images revealed a mass with minimal contrast enhancement that extended into the left L3–L4 foramen and psoas muscle (Fig. 1). Magnetic resonance images revealed a mass that was isointense on T1-weighted images and hyperintense on T2-weighted images compared with muscle (Fig. 2, Fig. 3), with homogenous enhancement after contrast administration (Fig. 2, Fig. 3), consistent with nerve sheath tumors. Pathologic specimens obtained at surgery showed Ewing sarcoma that has imaging features similar to nerve sheath tumors. Extraskeletal Ewing sarcoma is rare but has been reported [
- Dogan S.
- Leković G.P.
- Theodore N.
- Horn E.M.
- Eschbacher J.
- Rekate H.L.
Primary thoracolumbar Ewing's sarcoma presenting as isolated epidural mass.
Spine J. 2009; 9: e9-e14
- Lozupone E.
- Martucci M.
- Rigante L.
- Gaudino S.
- Di Lella G.M.
- Colosimo C.
Magnetic resonance image findings of primary intradural Ewing sarcoma of the cauda equina: case report and review of the literature.
Spine J. 2014; 14: e7-e11
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- Primary thoracolumbar Ewing's sarcoma presenting as isolated epidural mass.Spine J. 2009; 9: e9-e14
- Magnetic resonance image findings of primary intradural Ewing sarcoma of the cauda equina: case report and review of the literature.Spine J. 2014; 14: e7-e11
Published online: February 24, 2015
FDA device/drug status: Not applicable.
Author disclosures: RS: Nothing to disclose. MÇ: Nothing to disclose. HO: Nothing to disclose. IY: Nothing to disclose. MK: Nothing to disclose.
© 2015 Elsevier Inc. Published by Elsevier Inc. All rights reserved.