{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,29]],"date-time":"2026-07-29T06:26:04Z","timestamp":1785306364211,"version":"3.55.0"},"reference-count":27,"publisher":"Scientific Scholar","content-domain":{"domain":["surgicalneurologyint.com"],"crossmark-restriction":true},"short-container-title":[],"abstract":"\nBackground: <\/jats:title>\nThe intracranial lipomas are rare congenital malformations accounting for approximately 0.1\u20131.3% of all intracranial tumors, of which Sylvian fissure lipomas account for <5%. These lesions are frequently associated with dysgenesis of neuronal brain tissues and vascular malformations and in the majority are asymptomatic. Intracranial lipomas on magnetic resonance imaging (MRI) may mimic late subacute hemorrhage due to similar radiological features. Due to the tight adhesion of the lipoma to the surrounding nerve structures and vessels, complete removal is difficult and does not guarantee the disappearance of symptoms.<\/jats:p>\n<\/jats:sec>\n\nCase Description: <\/jats:title>\nWe present the case of a 42-year-old woman with chronic headaches and short-term memory impairment who was admitted to the emergency room after an out-of-hospital brain MRI with suspected ruptured right middle cerebral artery (MCA) aneurysm and late subacute intracranial hemorrhage. In the hospital, after clinical evaluation, emergency computed tomography (CT) angiography was performed, which revealed an unruptured fusiform aneurysm located in the right MCA trifurcation surrounded by an extremely hypodense lesion corresponding to fat in the right Sylvian fissure. No features of intracranial hemorrhage were present. The diagnosis of intracranial lipoma was finally confirmed after the MRI of the brain with a fat suppression sequence. Surgical treatment was not attempted, and the patient was treated conservatively with a satisfactory general outcome.<\/jats:p>\n<\/jats:sec>\n\nConclusion: <\/jats:title>\nA Sylvian fissure lipoma may be associated with a fusiform aneurysm in the MCA trifurcation. By modifying the standard MRI protocol and performing a CT scan, an intracranial lipoma can be detected and a late subacute intracranial hemorrhage can be excluded.<\/jats:p>\n<\/jats:sec>","DOI":"10.25259\/sni_362_2023","type":"journal-article","created":{"date-parts":[[2023,7,28]],"date-time":"2023-07-28T07:28:44Z","timestamp":1690529324000},"page":"268","update-policy":"https:\/\/doi.org\/10.25259\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Sylvian fissure lipoma associated with fusiform aneurysm in the middle cerebral artery trifurcation: A case report and literature review"],"prefix":"10.25259","volume":"14","author":[{"given":"Karol Sylwester","family":"Karamon","sequence":"first","affiliation":[{"name":"Department of Radiology, Institute of Psychiatry and Neurology, Warsaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Micha\u0142","family":"Sobstyl","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Institute of Psychiatry and Neurology, Warsaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcin","family":"Rylski","sequence":"additional","affiliation":[{"name":"Department of Radiology, Institute of Psychiatry and Neurology, Warsaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Katarzyna","family":"Wieczorek","sequence":"additional","affiliation":[{"name":"Department of Department of Medical Radiology, Military Institute of Medicine, Warsaw, Poland."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"10894","published-online":{"date-parts":[[2023,7,28]]},"reference":[{"key":"10.25259\/SNI_362_2023\/ref-1","doi-asserted-by":"crossref","first-page":"1518","DOI":"10.4103\/0028-3886.241352","article-title":"Distal Sylvian fissure lipoma masquerading as a vascular malformation with bleed","volume":"66","author":"Ahmed Chandshah","year":"2018","journal-title":"Neurol India"},{"key":"10.25259\/SNI_362_2023\/ref-2","doi-asserted-by":"crossref","first-page":"43","DOI":"10.1016\/S1571-4675(03)00042-7","article-title":"Sylvian fissure lipoma associated with cortical dysplasia and abnormal vascularity","volume":"46","author":"Ahmeto\u011flu","year":"2003","journal-title":"Eur J Radiol Extra"},{"key":"10.25259\/SNI_362_2023\/ref-3","doi-asserted-by":"crossref","first-page":"134","DOI":"10.1111\/jon199993134","article-title":"MRI findings in 32 consecutive lipomas using conventional and advanced sequences","volume":"9","author":"Bakshi","year":"1999","journal-title":"J Neuroimaging"},{"key":"10.25259\/SNI_362_2023\/ref-4","doi-asserted-by":"crossref","first-page":"434","DOI":"10.5603\/FM.a2017.0112","article-title":"Middle cerebral artery anatomical variations and aneurysms: A retrospective study based on computed tomography angiography findings","volume":"77","author":"Brzegowy","year":"2018","journal-title":"Folia Morphol (Warsz)"},{"key":"10.25259\/SNI_362_2023\/ref-5","doi-asserted-by":"crossref","first-page":"575","DOI":"10.1177\/197140090501800508","article-title":"Intracranial aneurysm associated with perianeurysmal fat tissue lesion and parenchymal cystic changes","volume":"18","author":"Cerase","year":"2005","journal-title":"Rivista di Neuroradiologia"},{"key":"10.25259\/SNI_362_2023\/ref-6","doi-asserted-by":"crossref","first-page":"85","DOI":"10.1016\/j.surneu.2008.05.017","article-title":"Microsurgical removal of sylvian fissure lipoma with pterion keyhole approach-case report and review of the literature","volume":"70","author":"Chao","year":"2008","journal-title":"Surg Neurol"},{"key":"10.25259\/SNI_362_2023\/ref-7","doi-asserted-by":"crossref","first-page":"131","DOI":"10.1055\/s-0030-1249221","article-title":"When and how to investigate the patient with headache","volume":"30","author":"De Luca","year":"2010","journal-title":"Semin Neurol"},{"key":"10.25259\/SNI_362_2023\/ref-8","doi-asserted-by":"crossref","first-page":"139","DOI":"10.3109\/02688699209002916","article-title":"Intracranial lipomas: Current perspectives in their diagnosis and treatment","volume":"6","author":"Eghwrudjakpor","year":"1992","journal-title":"Br J Neurosurg"},{"key":"10.25259\/SNI_362_2023\/ref-9","first-page":"71","article-title":"Fusiform aneurysmal dilatation of pericallosal artery. 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