{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,11]],"date-time":"2026-07-11T11:00:02Z","timestamp":1783767602018,"version":"3.55.0"},"reference-count":10,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2021,2,1]],"date-time":"2021-02-01T00:00:00Z","timestamp":1612137600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Neuropathology"],"published-print":{"date-parts":[[2021,6]]},"abstract":"<jats:p>Extracranial carotid artery aneurysms (ECAAs) are rare, with the etiology mainly classified as degeneration or dissection. Pseudoaneurysms in the region are even rarer and are seen following trauma, iatrogenic injury, or infection. We report a case of extracranial carotid artery pseudoaneurysm (pseudo\u2010ECAA) with a rare clinical course and pathological features. A 58\u2010year\u2010old man presented with swelling and purpura on the left side of his neck after sneezing. Radiological examinations suggested a ruptured left common carotid artery aneurysm. The operative findings were consistent with a pseudoaneurysm. Pathological examination revealed disarrangement and degeneration of smooth muscle fibers in the media, in addition to scattered foci of mucoid accumulation and irregular\u2010shaped cavitation in the medial extracellular matrix, raising the possibility of an intrinsic dysfunction of the vascular wall in the pathological process of pseudoaneurysm formation.<\/jats:p>","DOI":"10.1111\/neup.12719","type":"journal-article","created":{"date-parts":[[2021,2,3]],"date-time":"2021-02-03T07:05:35Z","timestamp":1612335935000},"page":"191-195","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["A case of idiopathic extracranial carotid artery pseudoaneurysm with a rare clinical course and pathological features"],"prefix":"10.1111","volume":"41","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9032-7303","authenticated-orcid":false,"given":"Shunsuke","family":"Nomura","sequence":"first","affiliation":[{"name":"Department of 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