Congenital Absence of Internal Carotid Artery with Rare Type of Intercavernous Anastamosis and Ruptured Cerebral Aneurysm

Alurkar, Anand; Karanam, Lakshmi Sudha Prasanna; Oak, Sagar; Kori, Smita

doi:10.7860/jcdr/2016/17797.7549

Cited by 11 publications

(11 citation statements)

References 8 publications

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“…Absences of carotid arteries have been documented as early as 1787 per postmortem examination, with a case in a living patient as early as 1954 via angiography [1] , [2] . Interestingly, the most documented cases involving absence of the ICA are unilateral and most commonly reported on the left side [1] , [7] . Our case report is of particular interest because it demonstrates bilateral absence of the vessels.…”

Section: Discussionmentioning

confidence: 99%

“…The cause of congenital unilateral carotid absence has been attributed to disruption of the embryo by physical and hemodynamic pressure upon the embryo [2] . Such stresses are thought to include amniotic band constriction and folding of the embryo's neck region to one side [1] , [2] , [8] , [9] . However, no specific findings have been linked to the cause for absence of the bilateral ICAs [2] , [8] .…”

Section: Discussionmentioning

confidence: 99%

“…A strong indicator for a congenital cause is the lack of, or a very small/hypoplastic, bony carotid canal observed during such imaging studies [2] , [4] , [9] , [10] . This is because the formation of the skull base begins at weeks 5-6 of fetal life, whereas the formation of the ICA is normally completed around week 6 of fetal life [1] , [2] . Thus, no canal is formed for the ICA when the skull forms.…”

Section: Discussionmentioning

confidence: 99%

“…Bilateral congenital absence of the internal carotid arteries (ICA) is an uncommon condition, impacting less than 0.01% of the general population [1] , [2] , [3] , [4] . Absence of the ICA most often presents unilaterally in patients, thereby making instances of bilateral hypoplasia even more so intriguing [3] .…”

Section: Introductionmentioning

confidence: 99%

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Bilateral congenital absence of the internal carotid arteries: a case report

Chaudhry

Barreto

Ezhapilli

2018

Radiology Case Reports

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Congenital absence of the internal carotid artery is a rare occurrence. Even more infrequent are cases where the patient has a bilateral absence of the internal carotid arteries. Reported is a case of a 52-year-old woman who presented with optic nerve neuropathy, and was incidentally discovered to have a congenital bilateral absence of her internal carotid arteries. During computed tomography angiography imaging looking for cerebral venous thrombosis, related to her preexisting condition of bilateral elevated optic discs and residual left optic neuropathy, the findings were made. The absence of the arteries is not always recognizably symptomatic, with most findings being incidental through imaging studies only. This is because collateral flow allows for sufficient cerebral circulation. However, this condition puts such patients at higher risk for conditions such as aneurysms and subsequently strokes where the collateral flow exists.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bilateral congenital absence of the internal carotid arteries: a case report

Chaudhry

Barreto

Ezhapilli

2018

Radiology Case Reports

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“…The absence of the ICA requires the existence of alternative pathways to ensure the ipsilateral vascularization. In the ICA agenesis, Lie described 6 pathways of collateral circulation, named as type A to type F [2] , [3] . Type A refers to the unilateral absence of the ICA and collateral circulation to the ipsilateral anterior cerebral artery (ACA) through an anterior communicating artery (ACOM) and to the ipsilateral middle cerebral artery (MCA) from the hypertrophic posterior communicating artery (PCOM).…”

Section: Introductionmentioning

confidence: 99%

Computed tomography angiography of unilateral agenesis of the internal carotid artery: 2 cases report with focus on embryology, collateral pathways, and imaging

Pierro

Cilla

Cucci

et al. 2017

Radiology Case Reports

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Congenital absence of internal carotid artery (ICA) is a rare anomaly seen in around 0.01% of the population. High incidence of aneurysms is reported in these patients population. Many patients are asymptomatic as the development of a collateral circulation ensures cerebral perfusion. The embryology, the common collateral pathways, and the imaging findings associated with this anomaly are illustrated with 2 new cases. We reported the cases of 2 totally asymptomatic patients at the time of imaging in which ICA agenesis was proved on computed tomography angiography. On imaging, all the most important findings necessary for ICA agenesis diagnosis have been identified and described. Noninvasive imaging techniques are currently the mainstay of ICA agenesis diagnosis.

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