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.
Specialty: Immunology/Rheumatology
ICD-10: ,