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Vet Dermatol. 2018 Feb;29(1):45-e20. doi: 10.1111/vde.12503. Epub 2017 Oct 10.

Computed tomographic findings in 205 dogs with clinical signs compatible with middle ear disease: a retrospective study.

Author information

1
Small Animal Hospital, Dermatology Service, Université de Toulouse, ENVT, 23 chemin des Capelles, 31076, Toulouse, France.
2
Vedim, 70 rue Nicolas Margue, 4979, Fingig, Luxemburg.
3
Centre Scanner Vétérinaire, 45 avenue de Toulouse, 31650, Saint Orens, France.
4
UDEAR, Université de Toulouse, INSERM, ENVT, 23 chemin des Capelles, 31076, Toulouse, France.

Abstract

BACKGROUND:

Computed tomography (CT) is considered to be the reference method to evaluate middle ear structures.

OBJECTIVES:

To evaluate the presence and severity of CT changes in the middle ear and establish if any specific clinical presentations are associated with otitis media.

ANIMALS:

Medical records of animals referred for CT with history and clinical signs consistent with middle ear disease.

METHODS:

Retrospective evaluation of CT examinations of tympanic bullae performed over a six year period. Medical records were reviewed for signalment, clinical signs and cytological evaluation of the external ear canal. Dogs were divided into three clinical groups: chronic otitis externa (Group 1), peripheral vestibular disorder (Group 2) and other clinical presentations (Group 3).

RESULTS:

Group 1 - Of 214 ears, 87 (40.7%) had CT abnormalities: 38 of 87 (17.7%) had material-filled bullae, 42 of 87 (19.6%) had thickened bullae walls and seven of 87 (3.2%) had lysis of the bulla. Abnormalities were significantly more frequent in dogs with suppurative otitis than in erythemato-ceruminous otitis (57% and 23%, respectively; P = 0.003). Proliferative otitis, particularly in French bulldogs, was associated with severe otitis media. Group 2 - Of the 106 ears, 91 (85.8%) had normal tympanic bullae. Group 3 - Of the 26 ears from deaf dogs, 17 had filled bullae; all nine affected dogs were Cavalier King Charles spaniels. All dogs with Claude Bernard Horner syndrome or head tilt had normal tympanic bullae.

CLINICAL SIGNIFICANCE:

CT is useful for canine chronic otitis externa, particularly in suppurative or proliferative otitis, even in the absence of associated neurological signs.

PMID:
28994490
DOI:
10.1111/vde.12503
[Indexed for MEDLINE]

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