{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,3]],"date-time":"2026-02-03T10:29:20Z","timestamp":1770114560934,"version":"3.49.0"},"reference-count":36,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"24","license":[{"start":{"date-parts":[[2025,6,16]],"date-time":"2025-06-16T00:00:00Z","timestamp":1750032000000},"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 Cosmet Laser Ther"],"published-print":{"date-parts":[[2025,6,16]]},"abstract":"\n BACKGROUND<\/jats:title>\n Thrombosed intracranial aneurysms are rare in pediatric populations and pose significant diagnostic challenges due to their atypical imaging features, which often mimic neoplasms. These lesions can present with mass effect, contrast enhancement, and calcifications, leading to potential misdiagnosis and inappropriate management. Accurate differentiation through advanced imaging is essential to prevent surgical complications and ensure optimal outcomes.<\/jats:p>\n <\/jats:sec>\n \n OBSERVATIONS<\/jats:title>\n The authors describe the case of a 15-year-old boy with severe acute headaches and an MRI finding of a contrast-enhancing lesion in the left cerebellar tonsil abutting the medulla oblongata, suggestive of a neoplasm. Neurological examination was normal, and there was no significant medical history. Despite negative angiographic findings, the unclear etiology warranted surgical intervention. A median suboccipital craniotomy revealed a capsule-like lesion with arterial feeders from the posterior inferior cerebellar artery. Complete resection was achieved, and histopathology confirmed a thrombosed aneurysm. Postoperative recovery was uneventful, and 1-year follow-up showed full symptom resolution without recurrence.<\/jats:p>\n <\/jats:sec>\n \n LESSONS<\/jats:title>\n This case highlights the importance of considering thrombosed aneurysms in pediatric patients with atypical intracranial lesions. Multidisciplinary collaboration and advanced imaging are crucial for accurate diagnosis and effective management. Documenting such cases enhances understanding, refines diagnostic strategies, and improves patient care.<\/jats:p>\n \n https:\/\/thejns.org\/doi\/10.3171\/CASE2592<\/jats:ext-link>\n <\/jats:p>\n <\/jats:sec>","DOI":"10.3171\/case2592","type":"journal-article","created":{"date-parts":[[2025,6,16]],"date-time":"2025-06-16T20:02:16Z","timestamp":1750104136000},"source":"Crossref","is-referenced-by-count":0,"title":["When an aneurysm pretends to be a tumor: thrombosed posterior inferior cerebellar artery aneurysm mimicking a neoplasm in a pediatric patient. Illustrative case"],"prefix":"10.3171","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3163-0545","authenticated-orcid":true,"given":"Belal","family":"Neyazi","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Otto-von-Guericke University, Magdeburg, Saxony-Anhalt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7264-0013","authenticated-orcid":true,"given":"Vanessa Magdalena","family":"Swiatek","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Otto-von-Guericke University, Magdeburg, Saxony-Anhalt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-3799-6194","authenticated-orcid":true,"given":"Roland","family":"Schwab","sequence":"additional","affiliation":[{"name":"Department of Neuroradiology, Otto-von-Guericke University, Magdeburg, Saxony-Anhalt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christian","family":"Mawrin","sequence":"additional","affiliation":[{"name":"Institute of Neuropathology, Otto-von-Guericke University, Magdeburg, Saxony-Anhalt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Klaus-Peter","family":"Stein","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Otto-von-Guericke University, Magdeburg, Saxony-Anhalt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ali","family":"Rashidi","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Otto-von-Guericke University, Magdeburg, Saxony-Anhalt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daniel","family":"Behme","sequence":"additional","affiliation":[{"name":"Department of Neuroradiology, Otto-von-Guericke University, Magdeburg, Saxony-Anhalt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"I. Erol","family":"Sandalcioglu","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Otto-von-Guericke University, Magdeburg, Saxony-Anhalt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1754","reference":[{"issue":"1","key":"bib1","series-title":"Brain Tumor Res Treat","first-page":"39","article-title":"Thrombosed large middle cerebral artery aneurysm mimicking an intra-axial brain tumor: case report and review of literature","volume":"3","author":"Kim","year":"2015","unstructured":"Kim YJJeun SSPark JH.Thrombosed large middle cerebral artery aneurysm mimicking an intra-axial brain tumor: case report and review of literature. Brain Tumor Res Treat. 2015;3(1):39-43."},{"issue":"2","key":"bib2","series-title":"Cureus","first-page":"e22706","article-title":"Giant posterior inferior cerebellar artery aneurysm mimicking a brainstem tumor","volume":"14","author":"Sangrador-Deitos","year":"2022","unstructured":"Sangrador-Deitos MVRodr\u00edguez Hern\u00e1ndez LABalc\u00e1zar-Padr\u00f3n JCRuiz-Trevi\u00f1o ANathal E.Giant posterior inferior cerebellar artery aneurysm mimicking a brainstem tumor. Cureus. 2022;14(2):e22706."},{"issue":"9","key":"bib3","series-title":"Childs Nerv Syst","first-page":"1809","article-title":"A pediatric case of completely thrombosed giant cavernous carotid aneurysm with ipsilateral ICA occlusion mimicking an intra-axial cystic lesion: a case report and review of the literature","volume":"38","author":"Malikov","year":"2022","unstructured":"Malikov ASecen AEDaglioglu EBelen AD.A pediatric case of completely thrombosed giant cavernous carotid aneurysm with ipsilateral ICA occlusion mimicking an intra-axial cystic lesion: a case report and review of the literature. Childs Nerv Syst. 2022;38(9):1809-1812."},{"key":"bib4","series-title":"Case Rep Neurol Med","first-page":"435953","article-title":"Thrombosed large distal posterior inferior cerebellar artery aneurysm mimicking an infratentorial ependymoma","volume":"2014","author":"Woo","year":"2014","unstructured":"Woo PYMKo NMWChan KY.Thrombosed large distal posterior inferior cerebellar artery aneurysm mimicking an infratentorial ependymoma. Case Rep Neurol Med. 2014;2014:435953."},{"issue":"4","key":"bib5","series-title":"J Neurosurg","first-page":"1057","article-title":"Intrameatal thrombosed anterior inferior cerebellar artery aneurysm mimicking a vestibular schwannoma","volume":"114","author":"P\u00e4sler","year":"2011","unstructured":"P\u00e4sler DBaldauf JRunge USchroeder HWS.Intrameatal thrombosed anterior inferior cerebellar artery aneurysm mimicking a vestibular schwannoma. J Neurosurg. 2011;114(4):1057-1060."},{"issue":"6","key":"bib6","series-title":"Br J Neurosurg","first-page":"888","article-title":"A fully thrombosed giant posterior inferior cerebellar aneurysm mimicking an intracranial tumour in a child","volume":"26","author":"Lan","year":"2012","unstructured":"Lan ZGMa LDuan JYou C.A fully thrombosed giant posterior inferior cerebellar aneurysm mimicking an intracranial tumour in a child. Br J Neurosurg. 2012;26(6):888-890."},{"issue":"1","key":"bib7","series-title":"J Neuroimaging","first-page":"85","article-title":"Restricted diffusion in a thrombosed anterior cerebral artery aneurysm mimicking a dermoid cyst","volume":"22","author":"Fifi","year":"2012","unstructured":"Fifi JTKomotar RMeyers PKhandji ATanji KConnolly ES.Restricted diffusion in a thrombosed anterior cerebral artery aneurysm mimicking a dermoid cyst. 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J Neurosci Rural Pract. 2015;6(2):245-247."},{"key":"bib16","series-title":"Handb Clin Neurol","first-page":"283","article-title":"Supratentorial cavernous malformations","volume":"143","author":"Ellis","year":"2017","unstructured":"Ellis JABarrow DL.Supratentorial cavernous malformations. Handb Clin Neurol. 2017;143:283-289."},{"issue":"2","key":"bib17","series-title":"Neurosurg Cases Rev","article-title":"A review of radiographic imaging findings of ependymal tumors","volume":"2","author":"Maria Habib","year":"2019","unstructured":"Maria Habib HBansal ABelani P.A review of radiographic imaging findings of ependymal tumors. Neurosurg Cases Rev. 2019;2(2)."},{"issue":"4","key":"bib18","series-title":"Transl Pediatr","first-page":"1138","article-title":"Imaging of brain tumors in children: the basics\u2014a narrative review","volume":"10","author":"Resende","year":"2021","unstructured":"Resende LLAlves CAPF.Imaging of brain tumors in children: the basics\u2014a narrative review. 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Cureus. 2022;14(2):e22706."},{"issue":"9","key":"bib3","series-title":"Childs Nerv Syst","first-page":"1809","article-title":"A pediatric case of completely thrombosed giant cavernous carotid aneurysm with ipsilateral ICA occlusion mimicking an intra-axial cystic lesion: a case report and review of the literature","volume":"38","author":"Malikov","year":"2022","unstructured":"Malikov ASecen AEDaglioglu EBelen AD.A pediatric case of completely thrombosed giant cavernous carotid aneurysm with ipsilateral ICA occlusion mimicking an intra-axial cystic lesion: a case report and review of the literature. 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J Neurosurg. 2011;114(4):1057-1060."},{"issue":"6","key":"bib6","series-title":"Br J Neurosurg","first-page":"888","article-title":"A fully thrombosed giant posterior inferior cerebellar aneurysm mimicking an intracranial tumour in a child","volume":"26","author":"Lan","year":"2012","unstructured":"Lan ZGMa LDuan JYou C.A fully thrombosed giant posterior inferior cerebellar aneurysm mimicking an intracranial tumour in a child. Br J Neurosurg. 2012;26(6):888-890."},{"issue":"1","key":"bib7","series-title":"J Neuroimaging","first-page":"85","article-title":"Restricted diffusion in a thrombosed anterior cerebral artery aneurysm mimicking a dermoid cyst","volume":"22","author":"Fifi","year":"2012","unstructured":"Fifi JTKomotar RMeyers PKhandji ATanji KConnolly ES.Restricted diffusion in a thrombosed anterior cerebral artery aneurysm mimicking a dermoid cyst. J Neuroimaging. 2012;22(1):85-88."},{"issue":"11","key":"bib8","series-title":"Heliyon","first-page":"e11506","article-title":"Intracranial aneurysms mimicking third ventricular masses: case series and systematic review","volume":"8","author":"Yuzhe","year":"2022","unstructured":"Yuzhe LHaoyu LBo CWenyong LQing L.Intracranial aneurysms mimicking third ventricular masses: case series and systematic review. Heliyon. 2022;8(11):e11506."},{"key":"bib9","series-title":"Acta Neurol Belg","article-title":"A partially thrombosed aneurysm mimicking an intraventricular tumor","author":"Kimura","year":"2023","unstructured":"Kimura THong SIrie KIchi S.A partially thrombosed aneurysm mimicking an intraventricular tumor. Acta Neurol Belg. 2023."},{"issue":"8","key":"bib10","series-title":"Childs Nerv Syst","first-page":"2419","article-title":"Treatment of pediatric intracranial aneurysms: institutional case series and systematic literature review","volume":"40","author":"Brandel","year":"2024","unstructured":"Brandel MGPlonsker JHRennert RCTreatment of pediatric intracranial aneurysms: institutional case series and systematic literature review. Childs Nerv Syst. 2024;40(8):2419-2429."},{"issue":"6","key":"bib11","series-title":"Int J Exp Med","first-page":"6268","article-title":"Intracranial giant aneurysms in children and adolescents misdiagnosed as intracranial tumors before operation: 2 case reports.","volume":"11","author":"Jian","year":"2018","unstructured":"Jian ZYang ZSmerin DXiong X.Intracranial giant aneurysms in children and adolescents misdiagnosed as intracranial tumors before operation: 2 case reports. Int J Exp Med. 2018;11(6):6268-6275."},{"key":"bib12","series-title":"Interdiscip Neurosurg","first-page":"100561","article-title":"Case report: anterior cerebral artery pediatric fusiform thrombosed giant aneurysm","volume":"19","author":"Ikeuchi","year":"2020","unstructured":"Ikeuchi YKoyama JAzumi MAkutsu NKawamura AKohmura E.Case report: anterior cerebral artery pediatric fusiform thrombosed giant aneurysm. Interdiscip Neurosurg. 2020;19:100561."},{"issue":"2","key":"bib13","series-title":"J Pediatr Neurosci","first-page":"185","article-title":"Giant unruptured middle cerebral artery aneurysm presenting with complex partial seizure: a short review","volume":"12","author":"Satyarthee","year":"2017","unstructured":"Satyarthee GDSingh M.Giant unruptured middle cerebral artery aneurysm presenting with complex partial seizure: a short review. J Pediatr Neurosci. 2017;12(2):185-187."},{"issue":"3","key":"bib14","series-title":"Neurol Med Chir (Tokyo)","first-page":"127","article-title":"Rupture of a giant posterior inferior cerebellar artery aneurysm in an infant following a ventriculoperitoneal shunt\u2014case report","volume":"41","author":"Desai","year":"2001","unstructured":"Desai KNadkarni TMuzumdar DGoel A.Rupture of a giant posterior inferior cerebellar artery aneurysm in an infant following a ventriculoperitoneal shunt\u2014case report. Neurol Med Chir (Tokyo). 2001;41(3):127-130."},{"issue":"2","key":"bib15","series-title":"J Neurosci Rural Pract","first-page":"245","article-title":"Totally thrombosed giant anterior communicating artery aneurysm","volume":"6","author":"Kumar","year":"2015","unstructured":"Kumar VRRMadhugiri VSSasidharan GMGundamaneni SKYadav AKVerma SK.Totally thrombosed giant anterior communicating artery aneurysm. J Neurosci Rural Pract. 2015;6(2):245-247."},{"key":"bib16","series-title":"Handb Clin Neurol","first-page":"283","article-title":"Supratentorial cavernous malformations","volume":"143","author":"Ellis","year":"2017","unstructured":"Ellis JABarrow DL.Supratentorial cavernous malformations. Handb Clin Neurol. 2017;143:283-289."},{"issue":"2","key":"bib17","series-title":"Neurosurg Cases Rev","article-title":"A review of radiographic imaging findings of ependymal tumors","volume":"2","author":"Maria Habib","year":"2019","unstructured":"Maria Habib HBansal ABelani P.A review of radiographic imaging findings of ependymal tumors. Neurosurg Cases Rev. 2019;2(2)."},{"issue":"4","key":"bib18","series-title":"Transl Pediatr","first-page":"1138","article-title":"Imaging of brain tumors in children: the basics\u2014a narrative review","volume":"10","author":"Resende","year":"2021","unstructured":"Resende LLAlves CAPF.Imaging of brain tumors in children: the basics\u2014a narrative review. 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