Intimal hyperplasia detection after aneurysm treatment by flow diversion using magnetic resonance vessel wall imaging
Riccardo Russo1, Francesco Mistretta1, Mauro Bergui1
1Department of Neuroscience, Neuroradiological Unit, University of Turin, Azienda Ospedaliera Città della Salute e della Scienza Hospital, Turin, Italy.
Abstract:
In-stent caliber reduction due to neo-intimal hyperplasia (NIH) is an underestimated event that may follow flow diverter stent (FDS) implantation. Although mostly asymptomatic, this vascular reaction is a well-known risk factor for delayed ischemic strokes. Here we report on the contribution of magnetic resonance vessel wall imaging (MR-VWI), performed on a 1.5 T scanner, to detect in-stent stenosis and mural inflammation in a 40-year-old woman with cerebral aneurysm previously treated with FDS and presenting with motor disturbances on follow-up. Digital subtraction angiography and cone-beam CT confirmed 1.5 T MRVWI findings, highlighting the potential value of this non-invasive imaging technique in investigating and detecting NIH.
