MNP - mononeuropathy

Question 1

What are the pathologic features predictive of high grade PNST?

Answer 1

High mitotic index
Necrosis within the neoplasm
Transperineurial growth

Question 2

What are the MRI features predictive of high grade PNST?

Answer 2

Large volume
Severe peripheral contrast enhancement*

Degree of muscle atrophy, heterogeneous signal and tumor growth into the vertebral canal were not associated with grade.

Question 3

factors assoc with outcome in traumatic/iatrogenic sciatic injury in dog/cat

Answer 3

dog: ability to flex/extend tarsus
amplit CMAP >1.45mV (sensib 60%, specif 100%)

cat: spont activity in semitend/quadriceps
inhability to record CDP

Question 4

3 types of nerve lesion

Answer 4

neurotmesis: transect axon + perineural connective tissue

axotmesis: damage axon, preserved perineural connect tissue

neurapraxia: no lesion or focal demyelin

Question 5

breed + local for bilat hypertrophic ganglioneuritis

Answer 5

Staff Bull Terrier
C2

Question 6

Electrodiag factor for traumatic brachial plexus injury

Answer 6

radial CMAP amplitude (5mV specif 93%)

absence of cut trunci assoc with lower CMAP amp of radial and ulnar and thus with more impt axonal lesion for these nerve