{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,9]],"date-time":"2026-04-09T21:04:33Z","timestamp":1775768673582,"version":"3.50.1"},"reference-count":38,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"25","license":[{"start":{"date-parts":[[2021,12,20]],"date-time":"2021-12-20T00:00:00Z","timestamp":1639958400000},"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":[[2021,12,20]]},"abstract":"<jats:sec>\n                    <jats:title>BACKGROUND<\/jats:title>\n                    <jats:p>The diagnosis and management of acinic cell carcinoma (ACC) is often challenging given its similarity to benign tumors, high incidences of late recurrence and distant metastasis, and tendency to be resistant to systemic chemotherapy. A primary parotid ACC resulting in an intradural extramedullary mass has not been reported.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>OBSERVATIONS<\/jats:title>\n                    <jats:p>The authors describe such a case that presented as a progressive cervical myelopathy 29 years after initial diagnosis. The tumor, located at the C2\u2013C3 level, infiltrated the dura and contained both extradural and intradural components. This occurred 18 months after the incomplete resection of an extradural metastasis at the same location.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>LESSONS<\/jats:title>\n                    <jats:p>Although intracranial and extradural metastases of various primary malignancies are well reported, secondary spinal intradural malignancies are rare. As a result, there are no established guidelines for the surgical management of intradural extramedullary metastases and prognosis may be difficult to establish. In this case, treatment options were limited because systemic therapy options had been exhausted and repeated radiation to the area was not recommended. We report on this case to highlight the clinical course of a rare local recurrence after spinal metastasis leading to an intradural extramedullary tumor and to show that surgical intervention can lead to improvement of neurological symptoms.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3171\/case21591","type":"journal-article","created":{"date-parts":[[2021,12,20]],"date-time":"2021-12-20T02:06:16Z","timestamp":1639965976000},"source":"Crossref","is-referenced-by-count":1,"title":["Spinal metastasis of parotid acinic cell carcinoma followed by intradural extramedullary recurrence: illustrative case"],"prefix":"10.3171","volume":"2","author":[{"given":"Po Hsiang (Shawn)","family":"Yuan","sequence":"first","affiliation":[{"name":"Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lukas","family":"Grassner","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Medical University Innsbruck, Innsbruck, Austria"},{"name":"Institute of Molecular Regenerative Medicine, Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical Universit, Salzburg, Austria"},{"name":"Division of Neurosurgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Charles","family":"Fisher","sequence":"additional","affiliation":[{"name":"Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nicolas","family":"Dea","sequence":"additional","affiliation":[{"name":"Division of Neurosurgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada; and"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1754","reference":[{"issue":"10","key":"b1","series-title":"Eur Arch Otorhinolaryngol","doi-asserted-by":"publisher","first-page":"2673","DOI":"10.1007\/s00405-020-05998-6","article-title":"Acinic cell carcinoma of the parotid gland: from pathogenesis to management: a literature review","volume":"277","author":"Cavaliere M","year":"2020","unstructured":"Cavaliere M, De Luca P, Scarpa A,  Acinic cell carcinoma of the parotid gland: from pathogenesis to management: a literature review. 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