Congenital absence of the internal carotid artery with a persistent primitive trigeminal artery as a collateral pathway: a report of an anatomic variation
Congenital absence of the internal carotid artery (ICA) is rare, and patients with such a condition are often asymptomatic throughout their lifetime, because of sufficient collateral circulation. Collateral flow is provided via various channels; however, the role of persistent embryonic vessels under conditions in which the ICA is absent or occluded is unknown. We report a rare case of congenital absence of the left ICA and describe the collateral pathway consisting of a persistent trigeminal artery.
KeywordsInternal carotid artery Persistent trigeminal artery Collateral flow Absent ICA
Kim: manuscript writing, case analysis. Baek: project development, manuscript writing and editing, case analysis. Heo: case analysis. Jeong: manuscript editing, case analysis.
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