Table 1.

Dog population, initial neurologic signs, and clinical diagnosis work-up

Case	Breed	Sex	Age (years)	Neurologic signs	MRI	CSF
1	Labrador retriever	M	4	Acute onset of tremors, severe ataxia, cervical pain	Single brainstem lesion, hyperintense in T2 and FLAIR, variable contrast enhancement	Mononuclear pleocytosis
2	Chihuahua	M	4	Acute onset of depression, compulsive walking, cervical pain	Normal	Mononuclear pleocytosis
3	Half-breed	M	3	Acute onset of general tremors, tetraparesis, cervical pain	Diffuse spinal cord lesion at C3-C4, hyperintense in T2 and FLAIR, severe contrast enhancement	Mononuclear pleocytosis
4	Golden retriever	F	2	Acute onset of compulsive walking, cervical pain, depression, tetraparesis	Normal	Mononuclear pleocytosis
5	Cocker Spaniel	F	3.5	Peracute onset of circling, ataxia, vision deficit, cervical pain	Multifocal lesions in both white and gray matter, hyperintense in T2 and FLAIR, no contrast enhancement	Mononuclear pleocytosis
6	Poodle	F	1	Acute onset of severe circling, head tilt, seizures	Multifocal cerebrum and brainstem lesions, hyperintense in T2 and FLAIR, no contrast enhancement	Mixed pleocytosis (lymphocytic/mononuclear)
7	Yorkshire terrier	M	1.5	Acute onset of alternate mental status agitation-stupor, seizures	Diffused hyperintensity in T2 an FLAIR in all left brain hemisphere, variable contrast enhancement	Mononuclear pleocytosis
8	Boxer	F	2	Peracute onset of severe cervical pain and weakness, tremors, partial seizures	Multifocal lesions hyperintense in T2 and FLAIR, variable contrast enhancement	Mixed pleocytosis (mainly mononuclear)