In 1787, Tode documented the first case of internal carotid artery agenesis, identifying it on postmortem examination. In 1954, the first case of internal carotid artery agenesis at cerebral angiography was reported by Verbiest 1).

1)
Kumaresh A, Vasanthraj PK, Chandrasekharan A. Unilateral agenesis of internal carotid artery with intercavernous anastomosis: a rare case report. J Clin Imaging Sci. 2015 Jan 30;5:7. doi: 10.4103/2156-7514.150453. eCollection 2015. PubMed PMID: 25806142; PubMed Central PMCID: PMC4322372.