Abstract
In this work, 55 dogs with neurologycal disorder were examined and central neurological affections were detected by transcranial ultrasonography (TCUS). They were classifyed in hydrocephaly, lissencephaly, focal and difuse parenchimal disorders, and none changes. From the examinated dogs, 52.9% presented diagnosis compatible with hydrocephaly, being 55.1% female and 51.7% younger than 2 year-old. Fifteen dogs (27.3%) presented focal lesions, 7.2% diffuse lesions, 7.2% images that suggested lissencephaly, and in 5.4% no changes were detected by TCUS. It was concluded that hydrocephaly was the most frequent central neurologycal disorder and TCUS is a valuable alternative to be used in clinical routine as a tool of diagnostic to detect morphological and structural cerebral disorders in dogs.