MAGNETIC RESONANCE IMAGING FINDINGS OF PRESUMED CEREBELLAR CEREBROVASCULAR ACCIDENT IN TWELVE DOGS

doi:10.1111/j.1740-8261.2005.00001.x

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Wiley InterScience

Veterinary Radiology & Ultrasound

Volume 46 Issue 1, Pages 1 - 10

Published Online: 12 Jan 2005

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MAGNETIC RESONANCE IMAGING FINDINGS OF PRESUMED CEREBELLAR CEREBROVASCULAR ACCIDENT IN TWELVE DOGS

J. F. McConnell, BVM&S, DVR, DipECDVI, Cert. SAM MRCVS ¹ , L. Garosi, DVM ¹ and S. R. Platt, BVM&S ¹

¹ Animal Health Trust, Newmarket, Centre for Small Animal Studies, Suffolk CB8 7UU, UK

Address correspondence and reprint requests to J. Fraser McConnell, BVM&S DVR, DipECVDI, Cert SAM MRCVS, at the above address.
E-mail: fraser.mcconnell@aht.org.uk

KEYWORDS

cerebellar • cerebrovascular • diffusion • infarction • magnetic resonance imaging.

ABSTRACT

The magnetic resonance imaging (MRI) findings of presumed cerebrovascular accident in 12 dogs are described. Fourteen lesions were seen, commonly (11 of 14) within the gray matter of the cerebellar hemispheres or vermis. Thirteen lesions were hyperintense on T₂-weighted images (in 11 dogs) and one was hypointense. Eleven of 14 lesions were within the region supplied by the rostral cerebellar artery or one of its main branches and there was no, or minimal, mass effect. Contrast enhancement was only seen in six lesions and was mild in all. Gradient-echo images provided additional information in two dogs. The appearance of infarction in dogs with diffusion-weighted images (DWI) is similar to that in humans, and provided supportive evidence for the diagnosis of infarction in five dogs. The use of gradient-echo and DWI is recommended for the evaluation of suspected cerebrovascular accidents in dogs. Six of the 12 affected animals were spaniels or spaniel crosses, suggesting a possible breed predisposition.

Received December 7, 2003; accepted for publication June 16, 2004.

DIGITAL OBJECT IDENTIFIER (DOI)

10.1111/j.1740-8261.2005.00001.x About DOI