{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,7]],"date-time":"2025-05-07T04:59:01Z","timestamp":1746593941748},"reference-count":20,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["PED"],"published-print":{"date-parts":[[2015,2]]},"abstract":"<jats:p>Clinical and imaging manifestations of the so-called partially thrombosed aneurysm (PTA) are different from those of the classic intracranial saccular aneurysm. Given some of their peculiar imaging features, it had been hypothesized that some PTAs occur due to repeated intramural hemorrhages. The authors present a case of PTA that evolved from an acute dissecting aneurysm as shown by serial imaging. A previously healthy 5-year-old boy had a sudden onset of left hemiparesis. Initial MRI sequences showed a perforating vessel infarction in the right basal ganglia area secondary to an acute distal middle cerebral artery (MCA) dissection as demonstrated on conventional angiography. Conservative management with close observation of this dissection was chosen, and serial MRI studies revealed layering of blood of various ages within the wall of an aneurysmal outpouching of the MCA, thereby leading to the imaging appearance of a PTA. The findings in this case indicate that some PTAs may be caused by repeated or chronic dissections, with blood entering the wall through an endothelial defect. Understanding the pathological mechanism underlying the formation of these aneurysms will help inform appropriate treatment strategies.<\/jats:p>","DOI":"10.3171\/2014.10.peds14221","type":"journal-article","created":{"date-parts":[[2014,12,5]],"date-time":"2014-12-05T15:00:14Z","timestamp":1417791614000},"page":"192-196","source":"Crossref","is-referenced-by-count":7,"title":["Evolution of a chronic dissecting aneurysm on magnetic resonance imaging in a pediatric patient"],"prefix":"10.3171","volume":"15","author":[{"given":"Long","family":"Chen","sequence":"first","affiliation":[{"name":"Division of Neuroradiology, Department of Medical Imaging, Toronto Western Hospital, University Health Network, Toronto;\u00a0"},{"name":"Department of Interventional Radiology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ivanna","family":"Yau","sequence":"additional","affiliation":[{"name":"Departments of Neurology,"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gabrielle","family":"deVeber","sequence":"additional","affiliation":[{"name":"Departments of Neurology,"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peter","family":"Dirks","sequence":"additional","affiliation":[{"name":"Neurosurgery, and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Derek","family":"Armstrong","sequence":"additional","affiliation":[{"name":"Radiology, Hospital for Sick Children, Toronto;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Timo","family":"Krings","sequence":"additional","affiliation":[{"name":"Division of Neuroradiology, Department of Medical Imaging, Toronto Western Hospital, University Health Network, Toronto;\u00a0"},{"name":"Department of Neurosurgery, University of Toronto, Ontario, Canada; and"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1754","reference":[{"key":"b1-peds14221","series-title":"Radiology","doi-asserted-by":"publisher","first-page":"111","DOI":"10.1148\/radiology.162.1.3786749","article-title":"Partially thrombosed giant intracranial aneurysms: correlation of MR and pathologic findings","volume":"162","author":"Atlas","year":"1987"},{"key":"b2-peds14221","series-title":"Brain","first-page":"544","article-title":"The course and outcome of unilateral intracranial arteriopathy in 79 children with ischaemic stroke","volume":"132","author":"Braun","year":"2009"},{"key":"b3-peds14221","series-title":"Neurosurgery","doi-asserted-by":"publisher","first-page":"789","DOI":"10.1227\/00006123-199604000-00031","article-title":"Immunohistochemical detection of intracranial vasa vasorum: a human autopsy study","volume":"38","author":"Connolly","year":"1996"},{"key":"b4-peds14221","series-title":"Acta Neurochir (Wien)","doi-asserted-by":"publisher","first-page":"1153","DOI":"10.1007\/s00701-009-0270-0","article-title":"Symptomatic enlargement of an occluded giant carotidoophthalmic aneurysm after endovascular treatment: the vasa vasorum theory","volume":"151","author":"Dehdashti","year":"2009"},{"key":"b5-peds14221","series-title":"Neurol Med Chir (Tokyo)","doi-asserted-by":"publisher","first-page":"33","DOI":"10.2176\/nmc.41.33","article-title":"Serial neuroimaging of a growing thrombosed giant aneurysm of the distal anterior cerebral artery\u2014case report","volume":"41","author":"Kaneko","year":"2001"},{"key":"b6-peds14221","series-title":"Interv Neuroradiol","doi-asserted-by":"publisher","first-page":"117","DOI":"10.1177\/159101990701300201","article-title":"Growth and rupture mechanism of partially thrombosed aneurysms","volume":"13","author":"Krings","year":"2007"},{"key":"b7-peds14221","series-title":"Interv Neuroradiol","doi-asserted-by":"publisher","first-page":"151","DOI":"10.1177\/159101991001600206","article-title":"The many faces of intracranial arterial dissections","volume":"16","author":"Krings","year":"2010"},{"key":"b8-peds14221","series-title":"Childs Nerv Syst","doi-asserted-by":"publisher","first-page":"1309","DOI":"10.1007\/s00381-009-1054-9","article-title":"Pathomechanisms and treatment of pediatric aneurysms","volume":"26","author":"Krings","year":"2010"},{"key":"b9-peds14221","series-title":"Interv Neuroradiol","first-page":"39","article-title":"The aneurysmal wall. 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