Bilateral internal carotid artery agenesis with artery compression of the brain parenchyma.
Bilateral internal carotid artery (ICA) agenesis is an extremely rare congenital anomaly. The most common type of collateral circulation is developed through the circle of Willis via the basilar and posterior communicating arteries. Both anterior circulations are usually supplied by enlarged posterior communicating arteries (PCOMs). We present an unusual case of bilateral ICA agenesis, which is associated with dolichoectatic left PCOM and left posterior cerebral artery (PCA) compression of left basal ganglia and thalamus. These complex cerebral and vascular anomalies can be noninvasively revealed and evaluated by CT and MR.
Sun
Jihong
J
Department of Radiology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou City 310009, Zhejiang Province, PR China.
Jiang
Dingyao
D
Zhang
Shizheng
S
D001479:Basal Ganglia / Q000473:pathology; D002340:Carotid Artery Diseases / Q000151:congenital* / Q000000981:diagnostic imaging / Q000473:pathology*; D002343:Carotid Artery, Internal / Q000002:abnormalities* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D018810:Magnetic Resonance Angiography / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000379:methods; D008875:Middle Aged; D011859:Radiography; D013788:Thalamus / Q000473:pathology; D014463:Ultrasonography