scholarly journals Bilateral Agenesis of Internal carotid artery: A case report with emphasis on neuroimaging features

2017 ◽  
Vol 2 (1) ◽  
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
Incidental Finding ◽  
Anatomic Variation ◽  
Color Doppler ◽  
Clinical Signs ◽  
Signs And Symptoms ◽  
Congenital Absence ◽  
External Carotid

Congenital absence of the internal carotid artery is a rare anomaly, occurring in less than 0.01% of the population [1, 3]. It includes agenesis, aplasia, and hypoplasia of the internal carotid artery [2, 5]. Recognition of these anomalies has important implications during planned surgery, in thromboembolic disease and in the surveillance and detection of associated cerebral aneurysms [2, 3]. It is usually an incidental finding on color Doppler carotid ultra sonography, angiography, computed tomography or magnetic resonance imaging of the head and neck taken for some other indication [2, 6]. Most of the patients are asymptomatic due to the presence of sufficient cerebral circulation supplied by the communicating arteries of the circle of Willis, inter cavernous anastomosis, external carotid artery and by persistent embryologic arteries to the carotid artery territory. Nevertheless, in some cases this anatomic variation may eventually lead to some clinical signs and symptoms [2, 4, 6]. We present a rare case of congenital absence of both internal carotid arteries and its possible implications.

scholarly journals The Ambiguous "Internal Carotid Artery" - Ultrasound Diagnosis of One Case of Congenital Absence of The Internal Carotid Artery

2021 ◽  
Author(s):  
Gang Zhong ◽  
Jing Ning ◽  
Juan-Juan Xie ◽  
Fang Liu ◽  
Meng-Yi Huang ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
Superficial Temporal Artery ◽  
Temporal Artery ◽  
Congenital Absence ◽  
Rapid Screening ◽  
External Carotid ◽  
Anterior Communicating Artery ◽  
Small Blood Vessel

Abstract Background Congenital absence of the internal carotid artery (ICA) is a very rare congenital anomaly of the ICA. Most reports in the literature are of individual cases, and most were diagnosed by computed tomographic angiography (CTA) or digital subtraction angiography (DSA). There are few reports on the diagnosis of congenital absence of the ICA by carotid Doppler ultrasound (CDUS). Case presentation: A 61-year-old male patient who was admitted to the hospital because of dizziness and showed no abnormality on CDUS conducted at another hospital. CDUS conducted at our hospital found maldevelopment of the right common carotid artery (RCCA) with normal a blood flow velocity and spectrum. A high-resistance frequency spectrum could be detected in the “ICA” that continued directly from the RCCA, and two adjacent small blood vessel branches were also observed. Superficial temporal artery tap and tracing of the courses of the small blood vessels confirmed that the RCCA directly continued to the external carotid artery (ECA). The final diagnosis was congenital absence of the ICA, which was confirmed during the clipping of an anterior communicating artery (ACoA) aneurysm. Conclusion CDUS, as a noninvasive and rapid screening tool for cervical vascular diseases, offers a new approach for the diagnosis of congenital absence of the ICA.

Absence of the right common carotid artery: Doppler ultrasonographic and MR angiographic findings

Vascular ◽  
2014 ◽  
Vol 22 (5) ◽  
pp. 364-367 ◽  
Author(s):  
Fatma Esra Bahadır Ulger ◽  
Aykut Ulger ◽  
Mustafa Colak
Keyword(s):  
Carotid Artery ◽  
Common Carotid Artery ◽  
Doppler Ultrasonography ◽  
Internal Carotid ◽  
Incidental Finding ◽  
Color Doppler ◽  
External Carotid Artery ◽  
External Carotid ◽  
The Right ◽  
Angiographic Findings

We present a case of common carotid artery agenesis which is an extremely rare congenital anomaly. Less than 35 cases have been reported. These anomalies are typically asymptomatic and usually discovered as an incidental finding. Color Doppler ultrasonography is an effective and sensitive method for detecting absence of common carotid artery. But it is insufficient to identify the anomaly as a whole. Magnetic resonance angiography is a complementary technique to describe the origin of the external carotid artery and internal carotid artery.

Internal carotid artery anatomy – not always straightforward

Vascular ◽  
2022 ◽  
pp. 170853812110697
Author(s):  
Maroš Rudnay ◽  
Gabriela Rjašková ◽  
Viera Lehotská
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Ct Angiography ◽  
Carotid Arteries ◽  
Internal Carotid ◽  
Incidental Finding ◽  
Clinical Importance ◽  
External Carotid ◽  
Occipital Artery ◽  
Cervical Portion

Objectives To present a rare variant of internal carotid artery anatomy. Methods Case report presenting CT angiography finding of internal carotid anatomy variant. Results We present the case of an unusual origin of the occipital artery from cervical portion of the internal carotid artery as an incidental finding during CT angiography of the carotid arteries. In discussion, we discuss the possible embryological basis, incidence and prevalence of such finding and its possible clinical implications. Conclusion One of the specific aspects of carotid arteries is their straightforward anatomy – the cervical portion of internal carotid artery, unlike the external carotid, does not give origin to any branches – this aspect is even used as a highlight for orientation, e.g. during ultrasound examination. However, although rare, variants exist, and sometimes can have clinical importance – in the endovascular access or surgical treatment.

Retromandibular Fossa Approach to the High Cervical Internal Carotid Artery: An Anatomic Study

2008 ◽  
Vol 62 (suppl_5) ◽  
pp. ONS363-ONS370 ◽  
Author(s):  
Yusuf Izci ◽  
Roham Moftakhar ◽  
Mark Pyle ◽  
Mustafa K. Basşkaya
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
Average Length ◽  
Cranial Nerves ◽  
External Carotid Artery ◽  
External Carotid ◽  
Digastric Muscle ◽  
High Cervical ◽  
Cervical Internal Carotid Artery

Abstract Objective: Access to the high cervical internal carotid artery (ICA) is technically challenging for the treatment of lesions in and around this region. The aims of this study were to analyze the efficacy of approaching the high cervical ICA through the retromandibular fossa and to compare preauricular and postauricular incisions. In addition, the relevant neural and vascular structures of this region are demonstrated in cadaveric dissections. Methods: The retromandibular fossa approach was performed in four arterial and venous latex-injected cadaveric heads and necks (eight sides) via preauricular and postauricular incisions. This approach included three steps: 1) sternocleidomastoid muscle dissection; 2) transparotid dissection; and 3) removal of the styloid apparatus and opening of the retromandibular fossa to expose the cervical ICA with the internal jugular vein along with Cranial Nerves X, XI, and XII. Results: The posterior belly of the digastric muscle and the styloid muscles were the main obstacles to reaching the high cervical ICA. The high cervical ICA was successfully exposed through the retromandibular fossa in all specimens. In all specimens, the cervical ICA exhibited an S-shaped curve in the retromandibular fossa. The external carotid artery was located more superficially than the ICA in all specimens. The average length of the ICA in the retromandibular fossa was 6.8 cm. Conclusion: The entire cervical ICA can be exposed via the retromandibular fossa approach without neural and vascular injury by use of meticulous dissection and good anatomic knowledge. Mandibulotomy is not necessary for adequate visualization of the high cervical ICA.

Stenosis of the internal carotid artery: assessment using color Doppler imaging compared with angiography

1989 ◽  
Vol 152 (6) ◽  
pp. 1299-1305 ◽  
Author(s):  
SJ Erickson ◽  
MW Mewissen ◽  
WD Foley ◽  
TL Lawson ◽  
WD Middleton ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
Color Doppler ◽  
Color Doppler Imaging ◽  
Doppler Imaging

Dynamic Computed Tomography Angiography in Suspected Brain Death: A Noninvasive Biomarker

2014 ◽  
Vol 65 (4) ◽  
pp. 352-359 ◽  
Author(s):  
Santanu Chakraborty ◽  
Reem A. Adas
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Brain Death ◽  
Internal Carotid ◽  
External Carotid Artery ◽  
External Carotid ◽  
Ancillary Test ◽  
Organ Harvesting

Purpose Neurologic determination of death or brain death is primarily a clinical diagnosis. This must respect all guarantees required by law and should be determined early to avoid unnecessary treatment and allow organ harvesting for transplantation. Ancillary testing is used in situations in which clinical assessment is impossible or confounded by other factors. Our purpose is to determine the utility of dynamic computed tomographic angiography (dCTA) as an ancillary test for diagnosis of brain death. Materials and Methods We retrospectively reviewed 13 consecutive patients with suspected brain death in the intensive care unit who had dCTA. Contrast appearance timings recorded from the dCTA data were compared to findings from 15 controls selected from patients who presented with symptoms of acute stroke but showed no stroke in follow-up imaging. Results The dCTA allows us to reliably assess cerebral blood flow and to record time of individual cerebral vessels opacification. It also helps us to assess the intracranial flow qualitatively against the flow in extracranial vessels as a reference. We compared the time difference between enhancement of the external and internal carotid arteries and branches. In all patients who were brain dead, internal carotid artery enhancement was delayed, which occurred after external carotid artery branches were opacified. Conclusion In patients with suspected brain death, dCTA reliably demonstrated the lack of cerebral blood flow, with extracranial circulation as an internal reference. Our initial results suggest that inversion of time of contrast appearance between internal carotid artery and external carotid artery branches at the skull base could predict a lack of distal intracranial flow.

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