Peer-reviewed veterinary case report
CT scans often can't tell types of ear canal masses in dogs
By Colombe, Philippe et al.·Published in American journal of veterinary research·2025·Diagnostic Imaging Unit Anicura-ADVETIA Veterinary Referral Hospital, France·View original on PubMed →
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Original publication title: Computed tomography shows limited accuracy in differentiating histological types of canine ear canal masses.
- Species:
- dog
Plain-English summary
A group of 70 dogs with ear canal masses underwent CT scans and examinations to identify the type of mass present. The study found that most of these masses were inflammatory polyps, particularly in French Bulldogs, who were more likely to have these issues. While CT imaging could help visualize the masses, it was not very effective in determining the exact type of mass. However, if a mass had a specific mineralized pedicle, it was likely an inflammatory polyp.
People also search for: dog ear canal mass treatment · French Bulldog ear problems · CT scan for dog ear mass · inflammatory polyp in dogs · dog ear tumor diagnosis
Abstract
OBJECTIVE: 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. METHODS: 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. RESULTS: 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-attenuating 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. CONCLUSIONS: CT delineates EEC masses with a moderate sensitivity and shows a limited ability to predict histopathological diagnosis. CLINICAL RELEVANCE: A variably mineralized enhancing pedicle at the medial aspect of an EEC mass is strongly suggestive of an inflammatory polyp.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/40840527/