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Anatomic Variants on Computed Tomography in Congenital Aural Atresia and Stenosis
OBJECTIVES: To quantitatively analyzing the anatomic variants on temporal computed tomography (CT) in congenital external auditory canal stenosis (EACS), congenital aural atresia (CAA), and normal ear structure. METHODS: Through a retrospective study, we analyzed 142 temporal high-resolution CT stud...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Korean Society of Otorhinolaryngology-Head and Neck Surgery
2015
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4661245/ https://www.ncbi.nlm.nih.gov/pubmed/26622948 http://dx.doi.org/10.3342/ceo.2015.8.4.320 |
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author | Qin, Feng-hua Zhang, Tian-yu Dai, Peidong Yang, Lin |
author_facet | Qin, Feng-hua Zhang, Tian-yu Dai, Peidong Yang, Lin |
author_sort | Qin, Feng-hua |
collection | PubMed |
description | OBJECTIVES: To quantitatively analyzing the anatomic variants on temporal computed tomography (CT) in congenital external auditory canal stenosis (EACS), congenital aural atresia (CAA), and normal ear structure. METHODS: Through a retrospective study, we analyzed 142 temporal high-resolution CT studies performed in 71 microtia patients. The following 6 parameters were compared among the three groups: Marx classification, medial canal diameter, vertical facial nerve (VFN) anterior displacement, tegmen mastoideum position, tympanic cavity volume, and malleus-incus joint or malleus-incus complex (MIC) area. RESULTS: The results showed that the microtia distributions in the Marx classification in these three groups were significantly different, as 86% (31 of 35) of ears with major microtia (third-degree dysplasia) had an atresia, and in 54.8% (23 of 42) of the minor microtic (first-degree or second-degree) ears, the bony or cartilaginous part of the external auditory canal was stenotic. Measurement data also showed that the potential medial canal diameter of the atresia group was obviously shorter than that of the stenosis group. The VFN anterior displacement and temporomandibular joint backward-shift together lead to medial canal diameters in ears with atresic canals that is smaller than those with stenotic canals. The tegmen mastoideum position was not significantly different between the three groups. CONCLUSION: The mal-development of the external auditory canal is significantly associated with auricle and middle ear developmental anomalies. Compared with CAA ears, EACS have better development of the auricle, canal, tympanic cavity and MIC and relatively safer surgical operation except for the position of the tegmen mastoideum and the VFN. |
format | Online Article Text |
id | pubmed-4661245 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Korean Society of Otorhinolaryngology-Head and Neck Surgery |
record_format | MEDLINE/PubMed |
spelling | pubmed-46612452015-12-01 Anatomic Variants on Computed Tomography in Congenital Aural Atresia and Stenosis Qin, Feng-hua Zhang, Tian-yu Dai, Peidong Yang, Lin Clin Exp Otorhinolaryngol Original Article OBJECTIVES: To quantitatively analyzing the anatomic variants on temporal computed tomography (CT) in congenital external auditory canal stenosis (EACS), congenital aural atresia (CAA), and normal ear structure. METHODS: Through a retrospective study, we analyzed 142 temporal high-resolution CT studies performed in 71 microtia patients. The following 6 parameters were compared among the three groups: Marx classification, medial canal diameter, vertical facial nerve (VFN) anterior displacement, tegmen mastoideum position, tympanic cavity volume, and malleus-incus joint or malleus-incus complex (MIC) area. RESULTS: The results showed that the microtia distributions in the Marx classification in these three groups were significantly different, as 86% (31 of 35) of ears with major microtia (third-degree dysplasia) had an atresia, and in 54.8% (23 of 42) of the minor microtic (first-degree or second-degree) ears, the bony or cartilaginous part of the external auditory canal was stenotic. Measurement data also showed that the potential medial canal diameter of the atresia group was obviously shorter than that of the stenosis group. The VFN anterior displacement and temporomandibular joint backward-shift together lead to medial canal diameters in ears with atresic canals that is smaller than those with stenotic canals. The tegmen mastoideum position was not significantly different between the three groups. CONCLUSION: The mal-development of the external auditory canal is significantly associated with auricle and middle ear developmental anomalies. Compared with CAA ears, EACS have better development of the auricle, canal, tympanic cavity and MIC and relatively safer surgical operation except for the position of the tegmen mastoideum and the VFN. Korean Society of Otorhinolaryngology-Head and Neck Surgery 2015-12 2015-11-10 /pmc/articles/PMC4661245/ /pubmed/26622948 http://dx.doi.org/10.3342/ceo.2015.8.4.320 Text en Copyright © 2015 by Korean Society of Otorhinolaryngology-Head and Neck Surgery. http://creativecommons.org/licenses/by-nc/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Qin, Feng-hua Zhang, Tian-yu Dai, Peidong Yang, Lin Anatomic Variants on Computed Tomography in Congenital Aural Atresia and Stenosis |
title | Anatomic Variants on Computed Tomography in Congenital Aural Atresia and Stenosis |
title_full | Anatomic Variants on Computed Tomography in Congenital Aural Atresia and Stenosis |
title_fullStr | Anatomic Variants on Computed Tomography in Congenital Aural Atresia and Stenosis |
title_full_unstemmed | Anatomic Variants on Computed Tomography in Congenital Aural Atresia and Stenosis |
title_short | Anatomic Variants on Computed Tomography in Congenital Aural Atresia and Stenosis |
title_sort | anatomic variants on computed tomography in congenital aural atresia and stenosis |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4661245/ https://www.ncbi.nlm.nih.gov/pubmed/26622948 http://dx.doi.org/10.3342/ceo.2015.8.4.320 |
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