Philippe Colombe, Yannick Ruel, Pascal Prélaud, Amaury Briand, Mélanie Moreira André, Albert Agoulon, Frédérique Degorce-Rubiales, Hugues Gaillot
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引用次数: 0
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.
期刊介绍：
The American Journal of Veterinary Research supports the collaborative exchange of information between researchers and clinicians by publishing novel research findings that bridge the gulf between basic research and clinical practice or that help to translate laboratory research and preclinical studies to the development of clinical trials and clinical practice. The journal welcomes submission of high-quality original studies and review articles in a wide range of scientific fields, including anatomy, anesthesiology, animal welfare, behavior, epidemiology, genetics, heredity, infectious disease, molecular biology, oncology, pharmacology, pathogenic mechanisms, physiology, surgery, theriogenology, toxicology, and vaccinology. Species of interest include production animals, companion animals, equids, exotic animals, birds, reptiles, and wild and marine animals. Reports of laboratory animal studies and studies involving the use of animals as experimental models of human diseases are considered only when the study results are of demonstrable benefit to the species used in the research or to another species of veterinary interest. Other fields of interest or animals species are not necessarily excluded from consideration, but such reports must focus on novel research findings. Submitted papers must make an original and substantial contribution to the veterinary medicine knowledge base; preliminary studies are not appropriate.
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