Relation of Bony Carotid Canal Diameter and Clinical Manifestations in Patients with Moyamoya Disease

Ahn, So Hyun; Song, Hong-ki; Kim, Cheol Ho; Jang, Min Uk; Sohn, Jong-Hee; Choi, Hui Chul

doi:2016.18.1.1

Ann Clin Neurophysiol > 2016 ;18(1) > Article
ORIGINAL ARTICLE
Ann Clin Neurophysiol. 2016; 18(1): 1-6. Published online June 30, 2016. doi: https://doi.org/10.14253/kjcn.2016.18.1.1

Relation of Bony Carotid Canal Diameter and Clinical Manifestations in Patients with Moyamoya Disease

So Hyun Ahn¹, Hong-ki Song¹, Cheol Ho Kim², Min Uk Jang², Jong-Hee Sohn², and Hui Chul Choi²

¹Department of Neurology, Kangdong Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Korea
²Department of Neurology, Chuncheon Sacred Heart Hospital, College of Medicine, Chuncheon , Korea

Corresponding Author: Hui Chul Choi ,Tel: +82-33-240-5255, Fax: +82-33-241-8063, Email: dohchi@hallym.or.kr

Received February 28, 2016 Accepted June 1, 2016

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

ABSTRACT

Background: Moyamoya disease is characterized by a progressive stenosis or occlusion of the intracranial internal carotid artery and/or the proximal portion of the anterior cerebral artery and middle cerebral artery. Whether the onset time was childhood or adulthood, the bony carotid canal diameter might be different, but reflects the size of internal carotid artery passing through the bony carotid canal. In this study, we aimed to identify the relationship between bony carotid canal diameter and clinical manifestation.
Methods: 146 consecutive patients diagnosed with moyamoya disease by brain imaging studies were included. We measured the diameter of a transverse portion of bony carotid canal on bone window of a brain computed tomography(CT) image. Patients were divided into two groups, ischemic or hemorrhagic stroke according to clinical manifestation. As a result, 115 patients were included. The Suzuki stage was used as criteria for disease progression.
Results: Bony carotid canal diameter was 3.6 ± 0.5 (right) and 3.6 ± 0.4 (left) in the hemorrhagic stroke group, and 3.7 ± 0.4 (right) and 3.6 ± 0.4 (left) in the ischemic stroke group. The bony carotid canal diameter of the moyamoya vessels (3.6 mm) was smaller than the diameter of non-moyamoya vessels (3.8 mm), significantly (p = 0.042). However, there was no difference in the collateral patterns and clinical manifestation in a comparison of both groups.
Conclusions: In our study, there was no significant difference of clinical manifestations and collateral patterns depend on the bony carotid canal diameter in patients with moyamoya disease. These findings suggest that the clinical presentations of moyamoya disease are not related to the onset time of the disease.

Key words: Moyamoya disease, Carotid canal, Stroke