{"title":"IMAGING OF THE EXTERNAL AUDITORY CANAL: A Pictorial Review.","authors":"Humberto Morales","doi":"10.1053/j.sult.2025.09.010","DOIUrl":null,"url":null,"abstract":"<p><p>The external auditory canal (EAC) is composed by a cartilaginous and an osseous portion. Although it is a pathway, mainly communicating with the tympanic cavity, the EAC is bordering many spaces such as the temporomandibular joint, the temporal bone proper, skull base and the intracranial compartment. Although it can be accessed via clinical exam, there are instances where the view is obstructed, or the clinicians might suspect deeper pathologic involvement or need pre-operative evaluation. CT, MRI and Nuclear Medicine have a role in those cases. Pathologies can include infectious, malignant, epithelial or traumatic lesions, and among others, congenital processes can also affect the external auditory canal. The aim of this review is to familiarize the reader with anatomic landmarks, and to correlate them with important pathologic processes and their imaging findings.</p>","PeriodicalId":49541,"journal":{"name":"Seminars in Ultrasound Ct and Mri","volume":" ","pages":""},"PeriodicalIF":1.9000,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Seminars in Ultrasound Ct and Mri","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1053/j.sult.2025.09.010","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING","Score":null,"Total":0}
引用次数: 0
Abstract
The external auditory canal (EAC) is composed by a cartilaginous and an osseous portion. Although it is a pathway, mainly communicating with the tympanic cavity, the EAC is bordering many spaces such as the temporomandibular joint, the temporal bone proper, skull base and the intracranial compartment. Although it can be accessed via clinical exam, there are instances where the view is obstructed, or the clinicians might suspect deeper pathologic involvement or need pre-operative evaluation. CT, MRI and Nuclear Medicine have a role in those cases. Pathologies can include infectious, malignant, epithelial or traumatic lesions, and among others, congenital processes can also affect the external auditory canal. The aim of this review is to familiarize the reader with anatomic landmarks, and to correlate them with important pathologic processes and their imaging findings.
期刊介绍：
Seminars in Ultrasound, CT and MRI is directed to all physicians involved in the performance and interpretation of ultrasound, computed tomography, and magnetic resonance imaging procedures. It is a timely source for the publication of new concepts and research findings directly applicable to day-to-day clinical practice. The articles describe the performance of various procedures together with the authors'' approach to problems of interpretation.
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