title: Pediatric blunt carotid injury--case report.
abstract: A 5-year-old boy was struck by a pickup truck, and admitted with Glasgow Coma Scale score of 14. Initial computed tomography (CT) showed no evidence of intracerebral lesions except for a skull fracture. Repeat CT 5 hours later showed hyperdense middle cerebral artery (MCA) sign, but he did not show any focal signs. Eighteen hours after the accident, he developed left hemiparesis. CT revealed a fresh infarction in the right MCA territory, associated with definite hyperdense MCA sign. He was immediately transferred to our hospital for further evaluation. Emergent angiography revealed a rat tail-shaped occlusion of the right internal carotid artery at the C-3 level. Cross-filling of the right MCA territory was insufficient for collateral circulation. He was treated conservatively because of the significant risk of hemorrhagic change from the established infarction. His hemiparesis improved gradually, and he was discharged on foot. Hyperdense MCA sign in a child is an important clinical sign for the early detection of cerebral ischemia after blunt carotid injury, before any focal signs appear.
authors.affiliation: Department of Neurosurgery, Sasebo Central Hospital, Sasebo, Nagasaki, Japan. oshiro_shinya@hosp.pref.okinawa.jp
authors.forename: Shinya
authors.initials: S
authors.lastname: Oshiro
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Ohnishi
authors.forename: Mika
authors.initials: M
authors.lastname: Ohta
authors.forename: Hirohito
authors.initials: H
authors.lastname: Tsuchimochi
mesh_terms: D000063:Accidents, Traffic; D020212:Carotid Artery Injuries / Q000150:complications / Q000000981:diagnostic imaging* / Q000209:etiology; D002533:Cerebral Angiography; D002544:Cerebral Infarction / Q000000981:diagnostic imaging / Q000209:etiology; D002675:Child, Preschool; D006429:Hemiplegia / Q000209:etiology; D006801:Humans; D008297:Male; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D014949:Wounds, Nonpenetrating / Q000150:complications / Q000000981:diagnostic imaging*