{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T06:54:13Z","timestamp":1777877653579,"version":"3.51.4"},"reference-count":42,"publisher":"SAGE Publications","issue":"4","license":[{"start":{"date-parts":[[2025,5,12]],"date-time":"2025-05-12T00:00:00Z","timestamp":1747008000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["The Neurohospitalist"],"published-print":{"date-parts":[[2025,10]]},"abstract":"<jats:p>A 51-year-old woman presented with acute onset of a severe headache, and was found to have diffuse subarachnoid hemorrhage with prominent cisternal and left cortical convexity blood on head computed tomography. The first 2 conventional angiograms were negative for aneurysm, but a third angiogram revealed a mycotic aneurysm of a distal left middle cerebral artery branch. Brain biopsy, associated with clipping of the aneurysm, demonstrated pathology consistent with vasculitis. Over the course of a month, she developed diffuse, serpiginous dolichoectasia of the cerebral arteries. Further investigation into the cause of vasculitis supported a diagnosis of either eosinophilic granulomatosis with polyangiitis (EGPA) or IgG4-Related Disease (IgG4-RD). The following clinical pathologic conference discusses the diagnostic challenges in discriminating between these 2 diseases, particularly in the setting of secondary angiitis of the central nervous system.<\/jats:p>","DOI":"10.1177\/19418744251336501","type":"journal-article","created":{"date-parts":[[2025,5,12]],"date-time":"2025-05-12T20:18:36Z","timestamp":1747081116000},"page":"385-393","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["A 51-Year-Old Woman With Subarachnoid Hemorrhage and Secondary Central Nervous System Vasculitis With Progression to Diffuse, Serpiginous Dolichoectasia"],"prefix":"10.1177","volume":"15","author":[{"given":"Janet A.","family":"Montelongo","sequence":"first","affiliation":[{"name":"Department of Neurology, University of Kansas Medical Center, Kansas City, KS, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carley A.","family":"Ellis","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Kansas Medical Center, Kansas City, KS, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0531-4725","authenticated-orcid":false,"given":"Jennifer J.","family":"Cheng","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, University of Kansas Medical Center, Kansas City, KS, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Timothy A.","family":"Fields","sequence":"additional","affiliation":[{"name":"Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daffolyn Rachael","family":"Fels Elliott","sequence":"additional","affiliation":[{"name":"Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1498-6638","authenticated-orcid":false,"given":"Abid Y.","family":"Qureshi","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Kansas Medical Center, Kansas City, KS, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2025,5,12]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1002\/ana.410270305"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.3171\/JNS.2008.109.12.1034"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9343(69)90189-2"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1002\/ana.21226"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.1002\/ana.21430"},{"key":"e_1_3_3_7_2","doi-asserted-by":"publisher","DOI":"10.1001\/archneur.1972.00490120029002"},{"key":"e_1_3_3_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jns.2023.120664"},{"key":"e_1_3_3_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jns.2020.116899"},{"key":"e_1_3_3_10_2","doi-asserted-by":"publisher","DOI":"10.1097\/00005792-198801000-00002"},{"key":"e_1_3_3_11_2","doi-asserted-by":"publisher","DOI":"10.1055\/s-2008-1041091"},{"key":"e_1_3_3_12_2","doi-asserted-by":"publisher","DOI":"10.1097\/00006123-199601000-00045"},{"key":"e_1_3_3_13_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1468-1331.2006.01335.x"},{"key":"e_1_3_3_14_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00701-004-0292-6"},{"key":"e_1_3_3_15_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.clineuro.2014.11.010"},{"key":"e_1_3_3_16_2","doi-asserted-by":"publisher","DOI":"10.3171\/JNS\/2008\/109\/9\/0492"},{"key":"e_1_3_3_17_2","doi-asserted-by":"publisher","DOI":"10.3324\/haematol.2018.205526"},{"key":"e_1_3_3_18_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41584-023-00958-w"},{"key":"e_1_3_3_19_2","doi-asserted-by":"publisher","DOI":"10.1097\/00005792-199601000-00003"},{"key":"e_1_3_3_20_2","first-page":"4057024","article-title":"IgG4-Related disease, the malignancy mimicker: case series from Bahrain","volume":"2018","author":"Haider M","year":"2018","unstructured":"Haider M, Haji F, Alalwan O, Aljufairi E, Shah TS. 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