{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T12:36:09Z","timestamp":1791203769687,"version":"4.2.0"},"reference-count":88,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"3","license":[{"start":{"date-parts":[[2024,1,15]],"date-time":"2024-01-15T00:00:00Z","timestamp":1705276800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,1,15]]},"abstract":"<jats:sec>\n                    <jats:title>BACKGROUND<\/jats:title>\n                    <jats:p>Ewing\u2019s sarcoma is an uncommon, aggressive malignancy that typically presents as an osseous lesion, most commonly in children and adolescents. Very rarely Ewing\u2019s sarcoma can present as an intradural extramedullary mass mimicking more common tumors.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>OBSERVATIONS<\/jats:title>\n                    <jats:p>A 32-year-old female had a left L3 nerve root\u2013associated lesion identified in the setting of recent-onset radiculopathy. Contrast-enhanced magnetic resonance imaging of the lumbar spine was favored to demonstrate a schwannoma or neurofibroma. Hemilaminectomy, facetectomy, and resection of the mass led to improved radiculopathy and a tissue diagnosis of Ewing\u2019s sarcoma. Immediate referral to medical oncology facilitated expeditious initiation of adjuvant chemotherapy and radiation.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>LESSONS<\/jats:title>\n                    <jats:p>The differential diagnosis for newly identified nerve root\u2013associated tumors should remain broad, including common benign pathologies and rare malignant entities. Tissue remains the gold standard for diagnosis, as preoperative imaging suggested a nerve sheath tumor. Malignant pathologies such as Ewing\u2019s sarcoma must be considered, especially in the setting of rapidly progressive symptoms or interval growth on serial imaging. Early diagnosis allows for the timely initiation of comprehensive oncological care. Long-term multidisciplinary follow-up is necessary for the surveillance of disease progression.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3171\/case23459","type":"journal-article","created":{"date-parts":[[2024,1,15]],"date-time":"2024-01-15T18:54:08Z","timestamp":1705344848000},"source":"Crossref","is-referenced-by-count":6,"title":["Primary intradural extraosseous Ewing\u2019s sarcoma of the L3 nerve root: illustrative case"],"prefix":"10.3171","volume":"7","author":[{"given":"John D","family":"Arena","sequence":"first","affiliation":[{"name":"Departments of Neurosurgery, and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Saurabh","family":"Sinha","sequence":"additional","affiliation":[{"name":"Departments of Neurosurgery, and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Connor","family":"Wathen","sequence":"additional","affiliation":[{"name":"Departments of Neurosurgery, and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yohannes","family":"Ghenbot","sequence":"additional","affiliation":[{"name":"Departments of Neurosurgery, and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul J","family":"Zhang","sequence":"additional","affiliation":[{"name":"Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"William C","family":"Welch","sequence":"additional","affiliation":[{"name":"Departments of Neurosurgery, and"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"issue":"5","key":"b1","series-title":"Mayo Clin Proc","first-page":"475","article-title":"Common musculoskeletal tumors of childhood and adolescence","volume":"87","author":"Arndt CA","year":"2012","unstructured":"Arndt CA, Rose PS, Folpe AL, Laack NN Common musculoskeletal tumors of childhood and adolescence. 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