Diagnosis and tests for Rheumatoid Arthritis

Clinical examination.  

General analysis. This test provides information on the presence of inflammation by detecting elevated levels of acute phase reactants (sedimentation rate and C-reactive protein) and the presence of anaemia, among other things. It is also very useful for checking disease-specific values such as levels of rheumatoid factor (RF) and anti-citrullinated protein antibodies (ACPA). 

Simple x-ray. This imaging test is often used for affected joints in order to evaluate so-called bone erosion resulting from persistent synovitis, which causes the joint to become diseased. 

Ultrasound. This technique is being used more frequently as it allows the disease activity to be assessed, and it can even guide procedures such as joint injections. 

MRI. This is occasionally necessary.