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Emergence of the white-collar sign after coil embolization of cerebral aneurysms.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kiyofuji, Satoshi Matsumaru, Yuji Tsuruta, Wataro Hayakawa, Mikito Kamiya, Yuki
Description	Country affiliation: Japan Author Affiliation: Kiyofuji S ( Department of Neurosurgery, Fuji Brain Institute Hospital, 270-12 Sugita, Fujinomiya-city, Shizuoka, Japan.)
Abstract	BACKGROUND: The white-collar sign (WCS) is represented by the formation of neointimal tissue at the level of the aneurysm neck as the successful outcome on follow-up angiography after coil embolization. WCS has been reported only in aneurysms treated with Matrix® coils. This is the first study to report WCS emergence in aneurysms treated with bare platinum coils, and potential factors associated with WCS emergence were evaluated. METHOD: Total 130 unruptured (female: male ratio, 100: 30; mean age, 60 years) cerebral aneurysms were treated with coil embolization. Embolization status was assessed immediately and 1 year after treatment, and emergence of WCS in follow-up angiography was assessed. We evaluated the association between WCS emergence and aneurysm location, dome diameter, neck diameter, dome-neck ratio, and type of coil used (bare platinum or bioactive). RESULTS: WCS appeared in nine aneurysms (6.9%), of which six were treated only with bare platinum coils. Neck diameter was significantly smaller in the WCS-positive group than in the WCS-negative group. The proportion of aneurysms treated with bioactive coils was not significantly different between the groups. Immediate embolization status in the WCS-positive group tended to be slightly better than that in the WCS-negative group. No aneurysmal morphological characteristics other than small neck diameter were associated with WCS emergence. CONCLUSIONS: WCS is not specific to bioactive coil usage. Small neck diameter was significantly associated with WCS emergence in our series. Further investigations to clarify the predictors of WCS will contribute to progress of aneurysmal embolization.
File Format	HTM / HTML
ISSN	00016268
Issue Number	1
Volume Number	156
e-ISSN	09420940
Journal	Acta Neurochirurgica
Language	English
Publisher	Springer
Publisher Date	2014-01-01
Publisher Place	Austria
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Therapy Humans Middle Aged Intracranial Aneurysm Male Treatment Outcome Discipline Neurosurgery Embolization, Therapeutic Aged, 80 And Over Therapeutic Use Journal Article Aneurysm, Ruptured Cerebral Angiography Platinum Female Aged Diagnosis Methods
Content Type	Text
Resource Type	Article
Subject	Neurology (clinical) Surgery

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