A part of this work was presented at the 15th Annual Conference of the European Association of Veterinary Diagnostic Imaging. Chalkidiki—Thessaloniki—August 2007 (“Computed Tomography Pattern of Aural Cholesteatoma in 10 Dogs”).
COMPUTED TOMOGRAPHY FEATURES OF MIDDLE EAR CHOLESTEATOMA IN DOGS
Version of Record online: 7 APR 2010
© 2010 Veterinary Radiology & Ultrasound
Veterinary Radiology & Ultrasound
Volume 51, Issue 4, pages 374–379, July/August 2010
How to Cite
TRAVETTI, O., GIUDICE, C., GRECI, V., LOMBARDO, R., MORTELLARO, C. M. and DI GIANCAMILLO, M. (2010), COMPUTED TOMOGRAPHY FEATURES OF MIDDLE EAR CHOLESTEATOMA IN DOGS. Veterinary Radiology & Ultrasound, 51: 374–379. doi: 10.1111/j.1740-8261.2010.01682.x
- Issue online: 6 JUL 2010
- Version of Record online: 7 APR 2010
- Received July 11, 2009; accepted for publication February 7, 2010.
We describe the computed tomography (CT) findings in 11 dogs with middle ear cholesteatoma. The cholesteatoma appeared as an expansile tympanic cavity mass with a mean attenuation value of 55.8±4.2 Hounsfield units. There was no appreciable contrast enhancement of the tympanic bulla contense but ring enhancement was seen in four dogs. Due to the slow progressive growth, the lesion causes severe bone changes at the contour of the tympanic bulla, including osteolysis, osteoproliferation and osteosclerosis, expansion of the tympanic cavity, and sclerosis or osteoproliferation of the ipsilateral temporomandibular joint and paracondylar process. Cholesteatoma can cause lysis of the petrosal part of the temporal bone, leading to intracranial complications. Although not definitive, CT provides useful information for distinguishing a middle ear cholesteatoma from otitis media and neoplasia. In otitis media, enlargement of the tympanic cavity is not routinely observed. In tumors that primarily affect the middle or inner ear, the predominant signs are lysis of the contour of the tympanic bulla or the petrosal part of the temporal bone, soft tissue swelling around the middle ear and marked contrast enhancement. In tumors that arise from the external ear, a soft tissue mass is visible within the external acusticus meatus, and the middle ear is only involved secondarily.