{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T00:20:27Z","timestamp":1783470027604,"version":"3.55.0"},"reference-count":52,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"1","license":[{"start":{"date-parts":[[2026,7,6]],"date-time":"2026-07-06T00:00:00Z","timestamp":1783296000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Neurosurg Case Lessons"],"published-print":{"date-parts":[[2026,7,6]]},"abstract":"<jats:sec>\n                    <jats:title>BACKGROUND<\/jats:title>\n                    <jats:p>Anastomosing hemangioma (AH) is a rare benign vascular neoplasm recognized as a distinct entity in the 2020 WHO classification of soft tissue and bone tumors. Although primarily described in soft tissue and visceral organs, intraosseous AH is exceedingly rare and, to the authors\u2019 knowledge, primary sacral involvement has not been previously reported.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>OBSERVATIONS<\/jats:title>\n                    <jats:p>A 79-year-old woman presented with progressive sacral pain. MRI revealed a large, T2-hyperintense, heterogeneously enhancing sacral mass (60.2 \u00d7 48.5 \u00d7 39.8 mm) with osteolytic changes and focal cortical thinning, initially suspected to represent a malignant tumor. PET\/CT demonstrated fluorodeoxyglucose uptake (maximum standardized uptake value 3.8). Preoperative transarterial embolization was performed to mitigate hemorrhagic risk. Gross-total resection under microscopic visualization with spinopelvic reconstruction was achieved. Histopathological examination revealed anastomosing capillary-sized vascular channels lined by flat to hobnail endothelial cells, with immunoreactivity for CD31 and CD34, confirming the diagnosis of AH.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>LESSONS<\/jats:title>\n                    <jats:p>Sacral intraosseous AH may closely mimic aggressive neoplasms including chordoma, giant cell tumor, and metastasis, posing a significant diagnostic challenge. Accurate diagnosis requires histopathological confirmation. Preoperative embolization may facilitate safe resection by reducing intraoperative bleeding in hypervascular sacral tumors.<\/jats:p>\n                    <jats:p>\n                      <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/thejns.org\/doi\/10.3171\/CASE26302\">https:\/\/thejns.org\/doi\/10.3171\/CASE26302<\/jats:ext-link>\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.3171\/case26302","type":"journal-article","created":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T00:11:08Z","timestamp":1782864668000},"source":"Crossref","is-referenced-by-count":0,"title":["Primary intraosseous anastomosing hemangioma of the sacrum: illustrative case"],"prefix":"10.3171","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-8259-8569","authenticated-orcid":true,"given":"Myeonghwa","family":"Han","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Incheon St. Mary\u2019s Hospital, College of Medicine, The Catholic University of Korea, Seoul"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3007-2094","authenticated-orcid":true,"given":"Sun-Young","family":"Jun","sequence":"additional","affiliation":[{"name":"Department of Pathology, Incheon St. Mary\u2019s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-7516-5916","authenticated-orcid":true,"given":"Doo-yong","family":"Choi","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Incheon St. Mary\u2019s Hospital, College of Medicine, The Catholic University of Korea, Seoul"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"issue":"9","key":"bib1","series-title":"Am J Surg Pathol","first-page":"1364","article-title":"Anastomosing hemangioma of the genitourinary tract: a lesion mimicking angiosarcoma","volume":"33","author":"Montgomery","year":"2009","unstructured":"Montgomery EEpstein JI.Anastomosing hemangioma of the genitourinary tract: a lesion mimicking angiosarcoma. 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