Carotid-anterior cerebral artery anastomosis: MR angiographic features and literature review.
Carotid-anterior cerebral artery anastomosis is a rare anomaly of the anterior part of the circle of Willis. We report here magnetic resonance (MR) angiographic findings in 2 patients with this anomaly. MR angiographic source images are useful in evaluating the anatomical details of this anomaly. Including the 2 present cases, 27 patients with this anomaly have been reported in the English-language literature. Thirty anomalous arteries were found in the 27 patients (R/L/bilateral=22/2/3). The reason for the right-sided predominance is unknown.
Uchino
Akiro
A
Department of Radiology, Saga Medical School, 5-1-1, Nabeshima, Saga 849-8501, Japan. uchino@post.saga-med.ac.jp
Sawada
Akihiro
A
Takase
Yukinori
Y
Imaizumi
Takeshi
T
Egashira
Ryoko
R
Matsuo
Muneaki
M
Kudo
Sho
S
D000328:Adult; D002343:Carotid Artery, Internal / Q000002:abnormalities* / Q000601:surgery; D020785:Central Nervous System Vascular Malformations / Q000175:diagnosis* / Q000601:surgery; D002533:Cerebral Angiography / Q000379:methods; D002536:Cerebral Arteries / Q000002:abnormalities* / Q000601:surgery; D002941:Circle of Willis / Q000002:abnormalities* / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D018810:Magnetic Resonance Angiography; D008297:Male; D018570:Risk Assessment; D016896:Treatment Outcome