Journal article
Early Change in Ferumoxytol-Enhanced Magnetic Resonance Imaging Signal Suggests Unstable Human Cerebral Aneurysm. A Pilot Study
Stroke (1970), Vol.43(12), pp.3258-3265
12/2012
DOI: 10.1161/STROKEAHA.112.673400
PMCID: PMC3508354
PMID: 23138441
Abstract
Background and purpose: The clinical significance of early (ie, within the first 24 hours) uptake of ferumoxytol by macrophages in the wall of human cerebral aneurysms is not clear. The purpose of this study was to determine whether early uptake of ferumoxytol suggests unstable cerebral aneurysm.
Methods: Thirty unruptured aneurysms in 22 patients were imaged with magnetic resonance imaging 24 hours after infusion of ferumoxytol. Eighteen aneurysms were also imaged 72 hours after infusion of ferumoxytol. Aneurysm dome tissue was collected from 4 patients with early magnetic resonance imaging signal changes, 5 patients with late signal changes, and 5 other patients with ruptured aneurysms. The tissue was immunostained for expression of cyclooxygenase-1, cyclooxygenase-2, microsomal prostaglandin E2 synthase-1, and macrophages.
Results: In 23% (7/30) of aneurysms, there was pronounced early uptake of ferumoxytol. Four aneurysms were clipped. The remaining 3 aneurysms were managed conservatively; all 3 ruptured within 6 months. In 53% (16 of 30) of aneurysms, there was pronounced uptake of ferumoxytol at 72 hours. Eight aneurysms were surgically clipped, and 8 were managed conservatively; none ruptured or increased in size after 6 months. Expression of cyclooxygenase-2, microsomal prostaglandin E2 synthase-1, and macrophages was similar in unruptured aneurysms with early uptake of ferumoxytol and ruptured aneurysms. Expression of these inflammatory molecules was significantly higher in aneurysms with early uptake of ferumoxytol versus aneurysms with late uptake.
Conclusions: Uptake of ferumoxytol in aneurysm walls within the first 24 hours strongly suggests aneurysm instability and probability of rupture within 6 months, and may warrant urgent intervention.
Details
- Title: Subtitle
- Early Change in Ferumoxytol-Enhanced Magnetic Resonance Imaging Signal Suggests Unstable Human Cerebral Aneurysm. A Pilot Study
- Creators
- David Hasan - Department of Neurosurgery, Carver College of Medicine, University of Iowa, Iowa City, IowaNohra Chalouhi - Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PennsylvaniaPascal Jabbour - Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PennsylvaniaAaron S Dumont - Department of Neurosurgery, Thomas Jefferson University and Jefferson Hospital for Neuroscience, Philadelphia, PennsylvaniaDavid K Kung - Department of Neurosurgery, Carver College of Medicine, University of Iowa, Iowa City, IowaVincent A Magnotta - Department of Radiology, Carver College of Medicine, University of Iowa, Iowa City, IowaWilliam L Young - Department of Neurological Surgery, University of California San Francisco, San Francisco, CaliforniaTomoki Hashimoto - Department of Anesthesia and Perioperative Care, University of California San Francisco, San Francisco, CaliforniaH. Richard Winn - Department of Neurosurgery, Hofstra University and Lenox Hill Hospital, New York City, New YorkDonald Heistad - Departments of Internal Medicine and Pharmacology, Carver College of Medicine, University of Iowa, Iowa City, Iowa
- Resource Type
- Journal article
- Publication Details
- Stroke (1970), Vol.43(12), pp.3258-3265
- DOI
- 10.1161/STROKEAHA.112.673400
- PMID
- 23138441
- PMCID
- PMC3508354
- ISSN
- 0039-2499
- eISSN
- 1524-4628
- Language
- English
- Date published
- 12/2012
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Radiology; Psychiatry; Iowa Neuroscience Institute; Cardiovascular Medicine; Neuroscience and Pharmacology; Neurosurgery; Otolaryngology; Internal Medicine
- Record Identifier
- 9984040357102771
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