Table 2.

New characteristic features proposed for the diagnosis of paraneoplastic arthritis [adapted from Morel et al. (3)].

1. Average time between arthritis and neoplasia diagnosis <6 months

2. Men age >50 years

3. Polyarthritis (symmetric or asymmetric)

4. Absence of rheumatoid nodules

5. Absence of erosions on radiography

6. Absence of RF

7. Degradation of general health status

8. High CRP level

9. Regression of arthritis after specific anti-tumoral therapy

CRP, C-reactive protein; RF, rheumatoid factor.