Internal carotid artery (ICA) agenesis is an infrequent vascular anomaly, less than 0.01% of the population. Here we report a case of internal carotid agenesis with a rare collateral pathway, via supraclinoid ICA anastomosis to the contralateral supraclinoid ICA.
Keywords: Agenesis; Internal carotid artery; Magnetic resonance angiography; Supracavernous; Vascular anomaly.