Evaluation of dogs and cats with tumors of the ear canal: 145 cases (1978-1992)

Author:

London Cheryl A.1,Dubilzeig Richard R.1,Vail David M.1,Ogilvie Gregory K.1,Hahn Kevin A.1,Brewer William G.1,Hammer Alan S.1,O'Keefe Deborah A.1,Chun Ruthanne1,McEntee Margaret C.1,McCaw Dudley L.1,Fox Leslie E.1,Norris Alan M.1,Klausner Jeffery S.1

Affiliation:

1. From the Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI 53706 (London, Dubilzeig, Vail); College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523 (Ogilvie); Department of Urban Practice, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37901 (Hahn); Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, Auburn University...

Abstract

Objective To characterize the frequency, clinical signs, biologic behavior, and response to treatment of tumors of the ear canal in dogs and cats. Design Retrospective analysis of medical records. Animals Medical records of 81 dogs (48 malignant tumors, 33 benign tumors) and 64 cats (56 malignant tumors, 8 benign tumors). Procedure Data were analyzed for cats and dogs with malignant tumors, and risk factors were analyzed for their potential impact on survival time. Results Malignant tumor types most commonly reported included ceruminous gland adenocarcinoma, squamous cell carcinoma, and carcinoma of undetermined origin. Median survival time of dogs with malignant aural tumors was > 58 months, whereas that of cats was 11.7 months. A poor prognosis was indicated by extensive tumor involvement (dogs) and by neurologic signs at time of diagnosis, diagnosis of squamous cell carcinoma or carcinoma of undetermined origin, and invasion into lymphatics or blood vessels (cats). Clinical Implications Malignant tumors of the ear canal in dogs and cats have a propensity for local invasion, but tend not to metastasize. Squamous cell carcinoma and carcinoma of undetermined origin were the most locally aggressive tumors. Malignant tumors of the ear canal are best managed by aggressive surgical excision. Radiotherapy may be useful when tumors cannot be completely removed. (J Am Vet Med Assoc 1996;208:1413-1418)

Publisher

American Veterinary Medical Association (AVMA)

Subject

General Veterinary

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1. Ungewöhnlicher Mastzelltumor im Gehörgang einer Katze;Tierärztliche Praxis Ausgabe K: Kleintiere / Heimtiere;2024-02

2. Diseases of ear in dogs and cats;Introduction to Diseases, Diagnosis, and Management of Dogs and Cats;2024

3. Retrospective evaluation of ceruminous gland tumors confined to the external ear canal of dogs and cats treated with biopsy and CO2 laser ablation;Journal of Veterinary Internal Medicine;2023-09-20

4. CARCINOMA DE CÉLULAS ESCAMOSAS EM UMA JAGUATIRICA (LEOPARDUS PARDALIS);Arquivos do Instituto Biológico;2003-04

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