title: Bilateral caudate nucleus infarction associated with a missing A1 segment.
abstract: We describe a case of bilateral caudate nucleus infarction caused by cardioembolic stroke associated with a variant circle of Willis. The patient was an 81-year-old man with atrial fibrillation who presented with a sudden disturbance of consciousness. When he became more alert a few days later, he was abulic with no spontaneous speech or activity. A magnetic resonance imaging scan of the brain revealed cerebral infarction of bilateral caudate nucleus heads and the left frontal lobe. The left A1 segment was absent on 3-dimensional computed tomography angiography. One year later, abulia had completely resolved. Bilateral caudate nucleus infarction with variant circle of Willis is rare.
authors.affiliation: Department of Neurology, Saitama Medical University International Medical Center, Saitama, Japan. tfukuoka@saitama-med.ac.jp
authors.forename: Takuya
authors.initials: T
authors.lastname: Fukuoka
authors.forename: Aiko
authors.initials: A
authors.lastname: Osawa
authors.forename: Yasuko
authors.initials: Y
authors.lastname: Ohe
authors.forename: Ichiro
authors.initials: I
authors.lastname: Deguchi
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Maeshima
authors.forename: Norio
authors.initials: N
authors.lastname: Tanahashi
mesh_terms: D000369:Aged, 80 and over; D020144:Basal Ganglia Cerebrovascular Disease / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy; D002421:Caudate Nucleus / Q000098:blood supply*; D020785:Central Nervous System Vascular Malformations / Q000150:complications* / Q000175:diagnosis; D002533:Cerebral Angiography / Q000379:methods; D002544:Cerebral Infarction / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy; D002941:Circle of Willis / Q000002:abnormalities* / Q000000981:diagnostic imaging; D003244:Consciousness Disorders / Q000209:etiology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome