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  • Title: Primary Ewing sarcoma of lumbar spine with massive intraspinal extension.
    Author: Song X, Choi J, Rao C, Nallu S, Nicastri AD.
    Journal: Pediatr Neurol; 2008 Jan; 38(1):58-60. PubMed ID: 18054697.
    Abstract:
    Primary vertebral Ewing sarcoma-primitive neuroectodermal tumor is uncommon. Although epidural extension has been seen in such tumors, cases with massive intraspinal involvement are decidedly rare. Here we present the case of a 4-year-old girl with back pain and difficulty walking. Magnetic resonance imaging showed a mass filling the spinal canal from T(11) to the L(3)/L(4) levels. Vertebral involvement with extension into the paraspinal soft tissue through neural foramina was seen. Histologically, a small-blue-cell tumor with strong membranous CD99 reactivity was noted. Molecular analysis revealed translocation t(11;22)(q24;q12), thus confirming the diagnosis of Ewing sarcoma-primitive neuroectodermal tumor. Our case emphasizes that vertebral Ewing sarcoma-primitive neuroectodermal tumor may present with massive intraspinal extension and should be included in the differential diagnosis of intraspinal lesions.
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