"Distal stump" of the internal carotid artery with ascending pharyngeal artery collateralisation. A potential source for further embolic ischemia.
In 2 patients, clinically exhibiting recent amaurosis fugax and small cortical infarction, carotid occlusion had been shown by means of doppler ultrasound. IA-DSA showed a collateral circulation within the distal carotid artery in the base of the skull via the ascending pharyngeal artery. The slowly perfused stump of a distal carotid artery is supposed to be a potential source of emboli into the retinal or intracranial territories.
D002340:Carotid Artery Diseases / Q000150:complications / Q000000981:diagnostic imaging* / Q000503:physiopathology; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging*; D002533:Cerebral Angiography; D003097:Collateral Circulation; D003251:Constriction, Pathologic; D006801:Humans; D002546:Ischemic Attack, Transient / Q000000981:diagnostic imaging / Q000209:etiology*; D008297:Male; D008875:Middle Aged