Description

Jaccoud described a deforming arthropathy in 1869 associated with recurrent rheumatic fever. van Vugt et al developed an index for identifying this form of arthropathy which can occur in a variety of disorders.


 

Parameters:

(1) ulnar drift

(2) swan neck deformities

(3) Boutonniere deformities

(4) Z deformity in thumbs

 

Parameter

Finding

Points

ulnar drift > 20 degrees

0 fingers

0

 

1 to 4 fingers

2

 

5 to 8 fingers

3

swan neck deformities

0 fingers

0

 

1 to 4 fingers

2

 

5 to 8 fingers

3

Boutonniere deformities

0 fingers

0

 

1 to 4 fingers

1

 

5 to 8 fingers

2

Z deformity in thumbs

none

0

 

1 thumb

2

 

both thumbs

3

 

total score =

= SUM(points for all 4 parameters)

 

Interpretation:

• minimum score: 0

• maximum score: 11

• A score > 5 is indicates Jaccoud’s arthropathy.

 


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