Medically reviewed by Stella Bard, MD A rheumatoid factor (RF) test detects rheumatoid factor, a type of antibody (proteins that fight off harmful substances) in your blood. RF antibodies sometimes ...

Interestingly, about 20% of people with rheumatoid arthritis never develop positive rheumatoid factor results despite having the condition. These “seronegative” cases remind us that no single ...

Among patients with RA, ACPA status significantly modifies the relationship between BMI and cardiovascular risk.

Understanding the subtypes of juvenile idiopathic arthritis can help adult and pediatric rheumatologists manage patients ...

The usefulness of rheumatoid factor (RF) is hampered by low specificity ... who were negative for anti-MCV were positive for anti-CCP antibodies. Anti-MCV antibodies were also present in 6 ...