title: Congenital odontoid aplasia and posterior circulation stroke in childhood.
abstract: Head trauma and vigorous physical activity were followed by delayed-onset posterior circulation stroke in a 5-year-old boy with odontoid aplasia and C1-C2 subluxation. Angiography demonstrated vertebral artery narrowing and occlusion of the left anterior-inferior cerebellar and posterior cerebral arteries. Odontoid aplasia and other atlantoaxial dislocations are treatable causes of posterior circulation insufficiency in childhood; these defects may be overlooked without appropriate radiographic study of the cervical spine using flexion-extension views.
authors: Department of Neurology, Johns Hopkins Hospital, Baltimore, MD 21205.
authors: P C
authors: PC
authors: Phillips
authors: K J
authors: KJ
authors: Lorentsen
authors: L C
authors: LC
authors: Shropshire
authors: H S
authors: HS
authors: Ahn
mesh_terms: D001268:Atlanto-Axial Joint / Q000000981:diagnostic imaging / Q000293:injuries*; D001368:Axis, Cervical Vertebra / Q000002:abnormalities*; D002561:Cerebrovascular Disorders / Q000000981:diagnostic imaging / Q000209:etiology*; D002675:Child, Preschool; D006259:Craniocerebral Trauma / Q000150:complications*; D006801:Humans; D004204:Joint Dislocations / Q000150:complications* / Q000000981:diagnostic imaging; D008279:Magnetic Resonance Imaging; D008297:Male; D009809:Odontoid Process / Q000002:abnormalities*; D011859:Radiography