2nd order laboratory parameters – depending on the results of the history, physical examination and obligatory laboratory parameters – for differential diagnostic clarification.
- Small blood count
- Inflammatory parameters – CRP (C-reactive protein) or ESR (erythrocyte sedimentation rate).
- Rheumatoid factor (RF), ANA (antinuclear antibodies, anti-citrulline antibodies – if a rheumatological disease is suspected.
