Agenesia de artéria carótida interna

Abstract

Resumo A agenesia de carótida interna é uma anomalia rara. Na maioria dos casos, é assintomática devido às anastomoses que podem estar presentes, mas pode estar associada a complicações, principalmente quando evidenciada a presença de outras alterações anatômicas ou doença aterosclerótica grave. Relatamos o caso de uma paciente feminina de 63 anos, hipertensa e diabética, com história de cirurgia prévia para clipagem de aneurisma cerebral. Na investigação através de eco-Doppler e angiotomografia de carótidas e vertebrais, foi evidenciada agenesia unilateral da artéria carótida interna esquerda. Este relato objetiva chamar atenção para a importância de se suspeitar de malformações vasculares durante a investigação de quadros neurológicos. A agenesia de carótida interna tem uma importante associação com aneurismas intracerebrais, e é possível poupar o paciente de graves complicações quando estes são identificados a tempo.

Monocular central retinal artery occlusion caused by bilateral internal carotid artery hypoplasia complicated with patent foramen ovale: a case report and review of literature

“…ICA hypoplasia was first reported by autopsy in 1787. The hypoplasia occurs in less than 0.01% of the population [ 1 ] and the bilateral occurrence is even rarer (only < 10% of those cases) [ 4 ]. Although the cause of ICA hypoplasia is still undefined, the abnormal ICA development is the widely accepted view [ 5 ].…”

“…The diagnosis of ICA hypoplasia mainly depends on angiography, MRA, CTA, and DSA [ 1 ]. The following characteristics can be taken for diagnosis [ 3 ]: (1) the absence of ICA and carotid canal (in the bony CT window), (2) the compensatory collateral circulation, e.g., dilated basilar artery, PCoA, ACoA, and variations of Willis circle, and (3) lack of risk factors of atherosclerosis for arterial occlusion, such as hypertension, diabetes, and hyperlipidemia.…”

“…As the internal carotid artery (ICA) is one of the most important blood supply arteries to the brain, the hypoplasia of ICA is rare [ 1 ] and the bilateral occurrence is even rarer [ 2 ]. Most patients with ICA hypoplasia are asymptomatic owing to the compensatory collateral communication of the intracranial arteries [ 3 ].…”

Differentiation Between Internal Carotid Artery Hypoplasia and Acquired Narrowing by Neurovascular Ultrasound: Case Series and Literature Review

“…Congenital internal carotid artery (ICA) hypoplasia, with an incidence of 0.079%, 1 is a rare mutation characterized by an uniform narrowing of ICA without steno‐occlusion of the proximal portion or parietal anomalies such as wall thickening. The diagnosis of ICA hypoplasia relies mainly on angiographic imaging such as computed tomography angiography (CTA) or digital subtraction angiogram (DSA) in addition to ipsilateral small bony carotid canal (BCC) by skull base computed tomography (CT) 2,3 . Reports on ultrasonic manifestations of ICA hypoplasia are scarce.…”

“…The diagnosis of ICA hypoplasia relies mainly on angiographic imaging such as computed tomography angiography (CTA) or digital subtraction angiogram (DSA) in addition to ipsilateral small bony carotid canal (BCC) by skull base computed tomography (CT). 2,3 Reports on ultrasonic manifestations of ICA hypoplasia are scarce. The uniform narrowing of ICA can also be caused by acquired narrowing secondary to intracranial steno-occlusion, of which the color-code carotid duplex sonography (CCDS) findings strongly resemble that of ICA hypoplasia, but it is poorly recognized and frequently overlooked at ultrasonic diagnosis.…”