title: Extravasating contrast material on angiography following carotid angioplasty and stenting: not necessarily subarachnoid hemorrhage.
abstract: We describe a case of asymptomatic extravasation of iodinated contrast material into the sulci on digital subtraction angiography following carotid angioplasty and stenting resulting in sulcal hyperdensity on computed tomography (CT). We believe the mechanism for this observation is hyperperfusion injury and that in the absence of any associated clinical signs, it should not be considered alarming for subarachnoid hemorrhage.
authors.affiliation: Department of Diagnostic Imaging, Foothills Medical Centre, Calgary, Alberta, Canada. pranshu.sharma@calgaryhealthregion.ca
authors.forename: Pranshu
authors.initials: P
authors.lastname: Sharma
authors.forename: Alexandre Y
authors.initials: AY
authors.lastname: Poppe
authors.forename: Muneer
authors.initials: M
authors.lastname: Eesa
authors.forename: Nikolai
authors.initials: N
authors.lastname: Steffanhagan
authors.forename: Mark
authors.initials: M
authors.lastname: Hudon
authors.forename: William
authors.initials: W
authors.lastname: Morrish
mesh_terms: D017130:Angioplasty / Q000009:adverse effects*; D016893:Carotid Stenosis / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D002533:Cerebral Angiography / Q000009:adverse effects*; D003287:Contrast Media / Q000009:adverse effects; D005119:Extravasation of Diagnostic and Therapeutic Materials / Q000000981:diagnostic imaging / Q000209:etiology*; D006801:Humans; D007455:Iodine / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology; D016896:Treatment Outcome
chemical_list: D003287:Contrast Media; D007455:Iodine