Neuropathic Arthropathy + Synoviochondrometaplasia

Question 1

What is neuropathic arthoprathy and what is it due to

Answer 1

• Looks like a degenerative process run wild

- due to a loss of jt proprioception (and pain); causes multiple microfractures

Question 2

causes of neuropathic arthropathy (mc)

Answer 2

• Diabetes (mc)
• Syringomyelia
• spinal trauma
• syphilic dorsalis

Question 3

2 types of neuropathic arthropathy and mc loc for each

Answer 3

1. Hypertrophic (mc type)
   - lower extremity mc
2. Atrophic- upper extremity mc

Question 4

Hypertrophic neuropathic arthropathy findings

Answer 4

bag of bones

-mc in diabetes

Question 5

Overall radiographic findings of neuropathic arthropathy (6)

Answer 5

1. distention (swelling)
2. Density (increased)
3. Debris (oseus debris)
4. Destruction
5. Dislocation
6. Disorganization

Question 6

What is synoviochondrometaplasia (SCM)

Answer 6

-synovial nodules undergo metaplastic transformation to cartilage, then detach and ossify

–Jt mice

Question 7

What is the mc loc for SCM

Answer 7

knee is mc (50%)

Question 8

clinical presentation of SCM

Answer 8

• from nothing to large effusion + locking

- swelling, discomfort and reduced ROM mc

Question 9

Primary form of SCM characteristics

Answer 9

• numerous, equal in size/shape
• monoarticular (in otherwise normal jt)
• mc in 3rd/4th decade

Question 10

Secondary form of SCM

Answer 10

occurs in diseased jt

-few loose bodies, more variable in size