CNS

Question 1

What are the two abnormalities and what is it associated with?

Answer 1

narrowed foramen magnum and thickening of tentorium osseous cerebelli

hypovitaminosis A in a lion… rawr

Question 2

Diagnosis?

Answer 2

diplomyelia - spinal cord duplication secondary to rachischisis

diastematomyelia - spinal cord splitting (not this case)

Question 3

Type II Hansen’s have mineralized discs as common as Type I?

Answer 3

false

Type I very common, very uncommon in II

Question 4

Diagnosis

Answer 4

T12-T13 hydrated nucleus pulposus extrusion

Question 5

Most common hydrated nucleus pulposus extrusion sites?

Answer 5

T13-L1

C5-C6

Question 6

Males are more commonly affected by acute hydrated nucleus pulposus

True or False

Answer 6

True

Question 7

Imaging differentiation from cervical to thoracolumbar HNPE

Answer 7

thoracolumbar more likely lateralized and chondrodystrophic

cervical more likely acute traumatic and large breed

Hallmark imaging for both is the T2W hyperintense disc material

“seagull” sign is a cervical thing moreso

Question 8

Classic cervical HNPE

Answer 8

hyperintense T2W material in ventral spinal canal over narrow disc space

C4-C5 most common, then C3-C4 and C5-C6

“seagull” sign

Question 9

Diagnosis

Answer 9

HNPE cervical spine

“seagull” sign

Question 10

True or False

Cervical hyperesthesia is common in dogs with cervical HNPE

Answer 10

False

dogs tend to be non painful and non ambulatory

rare to have nerve root involvement - in people there is no pain unless lateralized