Morphology and Anatomical Variability of the External Auditory Canal: A Population-Based MRI Study.
MRI
SHIP
ear
external auditory canal
measurement
visualization
Journal
Annals of anatomy = Anatomischer Anzeiger : official organ of the Anatomische Gesellschaft
ISSN: 1618-0402
Titre abrégé: Ann Anat
Pays: Germany
ID NLM: 100963897
Informations de publication
Date de publication:
28 Aug 2024
28 Aug 2024
Historique:
received:
04
05
2024
revised:
29
06
2024
accepted:
19
08
2024
medline:
31
8
2024
pubmed:
31
8
2024
entrez:
30
8
2024
Statut:
aheadofprint
Résumé
The external auditory canal (EAC) exhibits a complex morphology and strong inter-individual variations. However, these have not yet been comprehensively described in the literature. This study aims to determine the width, height and cross-sectional area of the cartilaginous portion of the EAC and to describe the three-dimensional morphology and variability of different EACs. Magnetic resonance imaging was performed on 870 subjects (401 male, 469 female, resulting in 1740 EACs) who participated in the longitudinal, population-based cohort study 'Study of Health in Pomerania-START-3'. The height and width were measured in the cartilaginous part of the EAC, between the first and second bend. The variability of the EAC morphology was visualized in three-dimensional models. The mean height (vertical length) of the EAC was 8.62mm (SD = 2.42) on the right, 8.47mm (SD = 2.36) on the left. The width (horizontal length) was 4.08mm (SD = 1.6) on the right, 3.93mm (SD = 1.64) on the left. The EAC cross-section was 28.6 mm This study enhances the understanding of otolaryngologists and anatomists regarding the complex morphology and variability of the cartilaginous portion of the EAC.
Sections du résumé
BACKGROUND
BACKGROUND
The external auditory canal (EAC) exhibits a complex morphology and strong inter-individual variations. However, these have not yet been comprehensively described in the literature.
PURPOSE
OBJECTIVE
This study aims to determine the width, height and cross-sectional area of the cartilaginous portion of the EAC and to describe the three-dimensional morphology and variability of different EACs.
METHODS
METHODS
Magnetic resonance imaging was performed on 870 subjects (401 male, 469 female, resulting in 1740 EACs) who participated in the longitudinal, population-based cohort study 'Study of Health in Pomerania-START-3'. The height and width were measured in the cartilaginous part of the EAC, between the first and second bend. The variability of the EAC morphology was visualized in three-dimensional models.
RESULTS
RESULTS
The mean height (vertical length) of the EAC was 8.62mm (SD = 2.42) on the right, 8.47mm (SD = 2.36) on the left. The width (horizontal length) was 4.08mm (SD = 1.6) on the right, 3.93mm (SD = 1.64) on the left. The EAC cross-section was 28.6 mm
CONCLUSION
CONCLUSIONS
This study enhances the understanding of otolaryngologists and anatomists regarding the complex morphology and variability of the cartilaginous portion of the EAC.
Identifiants
pubmed: 39214319
pii: S0940-9602(24)00111-0
doi: 10.1016/j.aanat.2024.152319
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
152319Informations de copyright
Copyright © 2024 The Author(s). Published by Elsevier GmbH.. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of Competing Interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests The authors have the following interests. The present work has been supported by a joint grant from Siemens Healthcare (Siemens, Erlangen, Germany) and the Federal State of Mecklenburg-West Pomerania. The University of Greifswald is a member of the ‘Center of Knowledge Interchange’ program of Siemens AG. A whole-body 1.5 Tesla MR system (Magnetom Avanto; Siemens Medical Solutions, Erlangen, Germany) was used in this study. There are no further patents, products in development or marketed products to declare. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.