Aberrant course of the petrous internal carotid artery associated with ipsilateral type 1 proatlantal artery

Purpose To describe an extremely rare case of an aberrant course of the petrous internal carotid artery (ICA) associated with an ipsilateral type 1 proatlantal artery (PA) that was diagnosed by cerebral magnetic resonance (MR) angiography. Case report The patient was a 64-year-old man with double vi...

Full description

Saved in:
Bibliographic Details
Published in:Surgical and radiologic anatomy (English ed.) 2022-03, Vol.44 (3), p.407-409
Main Authors: Watanabe, Kaho, Uchino, Akira, Kimura, Hiroshi, Baba, Yasutaka
Format: Article
Language:English
Subjects:
Anastomosis
Anatomic Variations
Anatomy
Angiography
Carotid Arteries
Carotid artery
Carotid Artery, Internal - diagnostic imaging
Carotid Artery, Internal - surgery
Fetuses
Humans
Imaging
Magnetic Resonance Angiography - methods
Magnetic resonance imaging
Magnetic Resonance Imaging - methods
Male
Medical imaging
Medicine
Medicine & Public Health
Middle Aged
Middle ear
Orthopedics
Radiology
Surgery
Vertebrae
Vertebral Artery - diagnostic imaging
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Purpose To describe an extremely rare case of an aberrant course of the petrous internal carotid artery (ICA) associated with an ipsilateral type 1 proatlantal artery (PA) that was diagnosed by cerebral magnetic resonance (MR) angiography. Case report The patient was a 64-year-old man with double vision. Cerebral MR imaging and MR angiography were subsequently performed using a 1.5-T scanner. MR angiography showed an aberrant course of the petrous right ICA that was associated with right type 1 PA. The left vertebral artery (VA) and proximal right VA were absent. Discussion An aberrant course of the petrous ICA is rare but clinically significant, because it is dangerous during middle ear surgery. Type 1 PA is an extremely rare type of persistent fetal anastomosis between the carotid and vertebrobasilar systems. Type 1 PA is also clinically significant, because it is dangerous during craniovertebral junction surgery. We found no similar cases in the relevant English-language literature. Conclusion Although both variations were seen ipsilaterally and were located relatively close to each other, the embryological development of these variations is quite different. In addition, no similar case has been reported previously. Thus, these may have formed incidentally.
ISSN:1279-8517
0930-1038
1279-8517
DOI:10.1007/s00276-022-02892-0