Duplicated posterior inferior cerebellar arteries one of which was supplied by the jugular branch of the ascending pharyngeal artery

Uchino, Akira; Kakehi, Yoshiaki

doi:10.1007/s00276-022-02984-x

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…PICAs arising from the carotid system show several variations, such as PICA supplied by the jugular branch or hypoglossal branch of the ascending pharyngeal artery [7,8], variant of the persistent hypoglossal artery [11] and PICA-type persistent trigeminal artery variant. The PICA is sometimes absent, and duplication of the PICA is not rare.…”

Section: Discussionmentioning

confidence: 99%

A posterior inferior cerebellar artery of C2 transverse foramen level origin that entered the spinal canal via the C1/2 intervertebral space demonstrated by computed tomography angiography

Uchino¹,

Kakehi²

2023

Surg Radiol Anat

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Purpose: To describe a case of a posterior inferior cerebellar artery (PICA) of C2 transverse foramen level vertebral artery (VA) origin that entered the spinal canal via the C1/2 intervertebral space.Case report: A 48-year-old man with posterior neck pain underwent computed tomography (CT) angiography and selective left vertebral angiography. Arterial dissection was found at the distal V2 segment of the left VA on subtracted CT angiography. The left PICA arising from the VA at the level of C2 transverse foramen was identi ed on CT angiography with bone imaging. This PICA of extracranial origin entered the spinal canal via the C1/2 intervertebral space, just like a PICA of C1/2 level origin.Discussion: The origins of PICAs show several variations. PICAs originating at the extracranial C1/2 level VA are relatively rare, with a reported prevalence of approximately 1%. Our patient had a left PICA arising from the VA at the level of the C2 transverse foramen. No similar cases have been reported in the relevant English-language literature. We speculated that the proximal short segment of the PICA arising from the C1/2 level VA regressed incidentally and that the distal segment of the PICA was supplied by the muscular branch of the VA arising from the level of the C2 transverse foramen. Conclusion:We reported the rst case of PICA arising from the C2 transverse foramen level VA. CT angiography with bone imaging is useful for identifying a PICA arising from the extracranial VA.

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Section: Discussionmentioning

confidence: 99%

A posterior inferior cerebellar artery of C2 transverse foramen level origin that entered the spinal canal via the C1/2 intervertebral space demonstrated by computed tomography angiography

Uchino¹,

Kakehi²

2023

Surg Radiol Anat

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An unexpected variation of occipital and ascending pharyngeal arteries: clinical implications

Roofeh,

Matthees,

Cevallos

2024

Surg Radiol Anat

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Purpose The eight typical External Carotid Artery (ECA) branches are the superior thyroid artery, ascending pharyngeal artery, lingual artery, facial artery, occipital artery, posterior auricular artery, maxillary artery, and superficial temporal artery. The Internal Carotid Artery (ICA) has no branches in the cervical region before entering the carotid canal. We identified a variant of the Occipital Artery (OA) and Ascending Pharyngeal Artery (APA) originating in the cervical portion of the ICA and wish to explore the clinical implications this variation may have. Methods Between August and December 2023, 28 formaldehyde donors were dissected in the anatomy course for first-year medical and physician assistant students at the Creighton University School of Medicine, Phoenix campus. Results In one donor, dissection of the right common carotid artery (CCA) revealed a variation of the ECA branches. Two branches were found on the proximal portion of the ICA. After tracing the branches cranially, we identified these as the OA and APA. These two arteries typically originate from the ECA. The bifurcation angle was observed to be nearly 180 degrees. This variation was only observed on the right side. Conclusion As the prevalence of this variation has only been described in one study, reporting at 0.14%, documentation and education of this anatomy aids surgeons and interventional radiologists in head and neck procedures. Exploring the paths of these ectopic arteries promotes informed decision making and risk stratification for carotid endarterectomy, arterial embolization, bypass procedures, and arterial harvesting. Furthermore, performing thorough imaging such as CT angiograms on patients preoperatively provides better foresight to minimize complications.

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A posterior inferior cerebellar artery of C2 transverse foramen level origin that entered the spinal canal via the C1/2 intervertebral space demonstrated by computed tomography angiography

Uchino¹,

Kakehi²

2023

Preprint

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Purpose: To describe a case of a posterior inferior cerebellar artery (PICA) of C2 transverse foramen level vertebral artery (VA) origin that entered the spinal canal via the C1/2 intervertebral space. Case report: A 48-year-old man with posterior neck pain underwent computed tomography (CT) angiography and selective left vertebral angiography. Arterial dissection was found at the distal V2 segment of the left VA on subtracted CT angiography. The left PICA arising from the VA at the level of C2 transverse foramen was identified on CT angiography with bone imaging. This PICA of extracranial origin entered the spinal canal via the C1/2 intervertebral space, just like a PICA of C1/2 level origin. Discussion: The origins of PICAs show several variations. PICAs originating at the extracranial C1/2 level VA are relatively rare, with a reported prevalence of approximately 1%. Our patient had a left PICA arising from the VA at the level of the C2 transverse foramen. No similar cases have been reported in the relevant English-language literature. We speculated that the proximal short segment of the PICA arising from the C1/2 level VA regressed incidentally and that the distal segment of the PICA was supplied by the muscular branch of the VA arising from the level of the C2 transverse foramen. Conclusion: We reported the first case of PICA arising from the C2 transverse foramen level VA. CT angiography with bone imaging is useful for identifying a PICA arising from the extracranial VA.

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Duplicated posterior inferior cerebellar arteries one of which was supplied by the jugular branch of the ascending pharyngeal artery

Cited by 3 publications

References 10 publications

A posterior inferior cerebellar artery of C2 transverse foramen level origin that entered the spinal canal via the C1/2 intervertebral space demonstrated by computed tomography angiography

A posterior inferior cerebellar artery of C2 transverse foramen level origin that entered the spinal canal via the C1/2 intervertebral space demonstrated by computed tomography angiography

An unexpected variation of occipital and ascending pharyngeal arteries: clinical implications

A posterior inferior cerebellar artery of C2 transverse foramen level origin that entered the spinal canal via the C1/2 intervertebral space demonstrated by computed tomography angiography

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