Laboratory parameters of the 1st order – obligatory laboratory tests.
- ESR (erythrocyte sedimentation rate) [“fall”: > 40 mm in the 1st hour (> 90% of cases)]
- CRP (C-reactive protein) [pathologically elevated]
- Small blood count
- Creatine kinase (CK) [not elevated]
- Rheumatoid factors (RF) [negative]
- Antibodies against citrullinated peptides [negative].
