Magnetic resonance imaging findings of presumed cerebellar cerebrovascular accident in twelve dogs

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 a ay matter of the cerebellar hemispheres or vermis. Thirteen lesions were hyperintense on T-2-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 diffuision-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 DNVI 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.