{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,6,6]],"date-time":"2025-06-06T07:09:06Z","timestamp":1749193746159},"reference-count":13,"publisher":"Scientific Scholar","content-domain":{"domain":["surgicalneurologyint.com"],"crossmark-restriction":true},"short-container-title":[],"abstract":"\nBackground: <\/jats:title>\nNontraumatic acute subdural hematoma (ASDH) may be caused by rupture of a microaneurysm of a cortical artery. In some cases, microaneurysms may have been caused by earlier trauma. Although it is difficult to detect microaneurysms on contrast-enhanced computed tomography (CT) angiography or digital subtraction angiography, it may be suspected based on the plain CT scan results and the clinical course.<\/jats:p>\n<\/jats:sec>\n\nCase Description: <\/jats:title>\nWe experienced three cases presumed to be ASDH due to rupture of a microaneurysm. Plain CT scan showed that the midline shift was smaller than the hematoma thickness, and we judged from the clinical course that there was no trauma immediately before the onset. All three patients had decreased consciousness after arrival and underwent craniotomy for hematoma removal. The source of hemorrhage was in the distal part of the cortical artery, and a microaneurysm was found. In one case, histopathological examination was performed, and traumatic pseudoaneurysm was diagnosed. The postoperative course was good in all three cases.<\/jats:p>\n<\/jats:sec>\n\nConclusion: <\/jats:title>\nIf nontraumatic ASDH is suspected, the source of hemorrhage may be located more distally to the middle cerebral artery than in traumatic ASDH; hence, extensive craniotomy is required to search for the location of hemorrhage.<\/jats:p>\n<\/jats:sec>","DOI":"10.25259\/sni_210_2021","type":"journal-article","created":{"date-parts":[[2021,8,8]],"date-time":"2021-08-08T19:31:31Z","timestamp":1628451091000},"page":"401","update-policy":"http:\/\/dx.doi.org\/10.25259\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Location of hemorrhage with nontraumatic acute subdural hematoma due to ruptured microaneurysm"],"prefix":"10.25259","volume":"12","author":[{"given":"Taro","family":"Yanagawa","sequence":"first","affiliation":[{"name":"Department of Stroke Center, Sagamihara Kyodo Hospital, Sagamihara, Kanagawa,"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Keiichi","family":"Yamashita","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Mito Brain Heart Center, Mito, Ibaraki, Japan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yoichi","family":"Harada","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Mito Brain Heart Center, Mito, Ibaraki, Japan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Toru","family":"Hatayama","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Mito Brain Heart Center, Mito, Ibaraki, Japan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takuji","family":"Kono","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Mito Brain Heart Center, Mito, Ibaraki, Japan."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"10894","published-online":{"date-parts":[[2021,8,9]]},"reference":[{"key":"10.25259\/SNI_210_2021\/ref-1","doi-asserted-by":"crossref","first-page":"217","DOI":"10.2176\/nmc.51.217","article-title":"Recurrent subdural hematoma from a pseudoaneurysm at the cortical branch of the middle cerebral artery after mild head injury: Case report","volume":"51","author":"Cho","year":"2011","journal-title":"Neurol Med Chir"},{"key":"10.25259\/SNI_210_2021\/ref-2","first-page":"30023","article-title":"Risk factors for recurrent hematoma after surgery for acute traumatic subdural hematoma","volume":"2019","author":"Heino","year":"2019","journal-title":"World Neurosurg"},{"key":"10.25259\/SNI_210_2021\/ref-3","doi-asserted-by":"crossref","first-page":"423","DOI":"10.1016\/S0090-3019(96)00398-9","article-title":"Acute subdural hematomas due to rupture of cortical arteries: A study of the points of rupture in 19 cases","volume":"47","author":"Matsuyama","year":"1997","journal-title":"Surg Neurol"},{"key":"10.25259\/SNI_210_2021\/ref-4","first-page":"503","article-title":"Pure subdural hematomas: A Postmortem analysis of their form and bleeding points","volume":"50","author":"Maxeiner","year":"2002","journal-title":"Neurosurgery"},{"key":"10.25259\/SNI_210_2021\/ref-5","doi-asserted-by":"crossref","first-page":"13","DOI":"10.1227\/00006123-198401000-00004","article-title":"Spontaneous arterial subdural hematoma","volume":"14","author":"McDermott","year":"1984","journal-title":"Neurosurgery"},{"key":"10.25259\/SNI_210_2021\/ref-6","first-page":"435","article-title":"Acute subdural hematomas of arterial origin","volume":"41","author":"O\u2019Brien","year":"1974","journal-title":"J Neurol Surg"},{"key":"10.25259\/SNI_210_2021\/ref-7","doi-asserted-by":"crossref","first-page":"596","DOI":"10.1001\/jama.1949.02910090022005","article-title":"Spontaneous nontraumatic subdural hematomas","volume":"141","author":"Scott","year":"1949","journal-title":"J Am Med Assoc"},{"key":"10.25259\/SNI_210_2021\/ref-8","doi-asserted-by":"crossref","first-page":"46","DOI":"10.4103\/2277-9175.204589","article-title":"Acute subdural hematoma and subarachnoid hemorrhage caused by ruptured cortical artery aneurysm: Case report and review of literature","volume":"6","author":"Shekarchizadeh","year":"2017","journal-title":"Adv Biomed Res"},{"key":"10.25259\/SNI_210_2021\/ref-9","doi-asserted-by":"crossref","first-page":"508","DOI":"10.2176\/nmc.31.508","article-title":"Clinicopathological study of bacterial intracranial aneurysms","volume":"31","author":"Takeshita","year":"1991","journal-title":"Neurol Med Chir"},{"key":"10.25259\/SNI_210_2021\/ref-10","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1212\/WNL.21.1.19","article-title":"Acute \u201cspontaneous\u201d subdural hemorrhage. An unusual form of cerebrovascular accident","volume":"21","author":"Talalla","year":"1971","journal-title":"Neurology"},{"key":"10.25259\/SNI_210_2021\/ref-11","doi-asserted-by":"crossref","first-page":"1931","DOI":"10.1007\/s00701-018-3634-5","article-title":"Repair of damaged cortical artery by direct micro-suture in surgical treatment of acute subdural hematoma: Technical note","volume":"160","author":"Uneda","year":"2018","journal-title":"Acta Neurochir"},{"key":"10.25259\/SNI_210_2021\/ref-12","doi-asserted-by":"crossref","first-page":"992","DOI":"10.1001\/archsurg.1950.01250021002002","article-title":"Ruptures of surface blood vessels on cerebral hemispheres as a cause of subdural hemorrhage","volume":"61","author":"Vance","year":"1950","journal-title":"Arch Surg"},{"key":"10.25259\/SNI_210_2021\/ref-13","doi-asserted-by":"crossref","first-page":"61","DOI":"10.1016\/0090-3019(95)80041-E","article-title":"Angiographic extravasation of contrast medium in acute \u201cspontaneous\u201d subdural hematoma","volume":"43","author":"Yasui","year":"1995","journal-title":"Surg Neurol"}],"container-title":["Surgical Neurology International"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/surgicalneurologyint.com\/location-of-hemorrhage-with-nontraumatic-acute-subdural-hematoma-due-to-ruptured-microaneurysm\/","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/surgicalneurologyint.com\/surgicalint-articles\/location-of-hemorrhage-with-nontraumatic-acute-subdural-hematoma-due-to-ruptured-microaneurysm\/","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,8,8]],"date-time":"2021-08-08T19:31:38Z","timestamp":1628451098000},"score":1,"resource":{"primary":{"URL":"http:\/\/surgicalneurologyint.com\/surgicalint-articles\/location-of-hemorrhage-with-nontraumatic-acute-subdural-hematoma-due-to-ruptured-microaneurysm\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,8,9]]},"references-count":13,"alternative-id":["10.25259\/SNI_210_2021"],"URL":"https:\/\/doi.org\/10.25259\/sni_210_2021","relation":{},"ISSN":["2152-7806"],"issn-type":[{"value":"2152-7806","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,8,9]]},"article-number":"401"}}