{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T10:46:41Z","timestamp":1783507601025,"version":"3.55.0"},"reference-count":25,"publisher":"American Veterinary Medical Association (AVMA)","issue":"11","license":[{"start":{"date-parts":[[2025,11,1]],"date-time":"2025-11-01T00:00:00Z","timestamp":1761955200000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["ajvr"],"published-print":{"date-parts":[[2025,11,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec id=\"sc_a1\">\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To describe the epidemiological characteristics and CT features in dogs with external ear canal (EEC) masses and assess the ability of CT to predict histopathological diagnosis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sc_a2\">\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>This was a retrospective, single-center study including 70 dogs that underwent otoendoscopic examination, head CT imaging, and histopathological analysis. Masses were categorized into 5 groups according to histopathological diagnosis. Computed tomography images were reviewed, and features were compared between groups.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sc_a3\">\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>71 EEC masses were studied, including inflammatory polyps (31 of 71 [44%]), malignant tumors (17 of 71 [24%]), inflammatory masses in a context of chronic otitis externa (15 of 71 [21%]), benign tumors (4 of 71 [6%]), and unclassified masses (4 of 71 [6%]). French Bulldogs were overrepresented (26 of 70 [37%]) and mainly affected by inflammatory masses (22 of 26 [85%]). Fifty-nine of 71 masses (83%) visualized on otoendoscopy were delineated on CT. Partial or total obliteration of the ipsilateral tympanic bulla by soft tissue\u2013attenuating material was noticed in 53 of 71 dogs (75%). An enhancing pedicle at the medial aspect of the masses was only seen in the polyp group (11 of 31 [35%]), and 9 of 11 pedicles were mineralized. No other CT variable allowed differentiation between histopathological groups.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sc_a4\">\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>CT delineates EEC masses with a moderate sensitivity and shows a limited ability to predict histopathological diagnosis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sc_a5\">\n                    <jats:title>Clinical Relevance<\/jats:title>\n                    <jats:p>A variably mineralized enhancing pedicle at the medial aspect of an EEC mass is strongly suggestive of an inflammatory polyp.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.2460\/ajvr.25.05.0180","type":"journal-article","created":{"date-parts":[[2025,8,21]],"date-time":"2025-08-21T17:59:36Z","timestamp":1755799176000},"source":"Crossref","is-referenced-by-count":1,"title":["Computed tomography shows limited accuracy in differentiating histological types of canine ear canal masses"],"prefix":"10.2460","volume":"86","author":[{"given":"Philippe","family":"Colombe","sequence":"first","affiliation":[{"name":"Diagnostic Imaging Unit Anicura-ADVETIA Veterinary Referral Hospital, V\u00e9lizy-Villacoublay, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yannick","family":"Ruel","sequence":"additional","affiliation":[{"name":"Diagnostic Imaging Unit Anicura-ADVETIA Veterinary Referral Hospital, V\u00e9lizy-Villacoublay, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8084-0039","authenticated-orcid":true,"given":"Pascal","family":"Pr\u00e9laud","sequence":"additional","affiliation":[{"name":"Dermatology Unit Anicura-ADVETIA Veterinary Referral Hospital, V\u00e9lizy-Villacoublay, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amaury","family":"Briand","sequence":"additional","affiliation":[{"name":"Dermatology Unit Anicura-ADVETIA Veterinary Referral Hospital, V\u00e9lizy-Villacoublay, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M\u00e9lanie","family":"Moreira Andr\u00e9","sequence":"additional","affiliation":[{"name":"Dermatology Unit Anicura-ADVETIA Veterinary Referral Hospital, V\u00e9lizy-Villacoublay, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Albert","family":"Agoulon","sequence":"additional","affiliation":[{"name":"Biologie Epid\u00e9miologie et Analyse de Risque en Sant\u00e9 Animale, Oniris, Institut National de recherche pour l\u2019agriculture, l\u2019Alimentation et l'Environnement, Nantes, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fr\u00e9d\u00e9rique","family":"Degorce-Rubiales","sequence":"additional","affiliation":[{"name":"Laboratoire d'Anatomie Pathologique V\u00e9t\u00e9rinaire du Sud-Ouest, Toulouse, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0804-1774","authenticated-orcid":true,"given":"Hugues","family":"Gaillot","sequence":"additional","affiliation":[{"name":"Diagnostic Imaging Unit Anicura-ADVETIA Veterinary Referral Hospital, V\u00e9lizy-Villacoublay, France"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1272","reference":[{"issue":"2","key":"B1","series-title":"Vet Clin North Am Small Anim Pract","first-page":"489","article-title":"Inflammatory polyps and aural neoplasia","volume":"34","author":"Fan TM","year":"2004","unstructured":"Fan TM, de Lorimier LP. 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