Rheumatoid arthritis is an autoimmune disease that affects multiple joints, resulting in pain, swelling, and stiffness. Tiredness and fever may also be present.

Rheumatoid arthritis is an autoimmune disease that affects multiple joints, resulting in pain, swelling, and stiffness. Tiredness and fever may also be present.

Polyarticular juvenile idiopathic arthritis–rheumatoid factor negative. This is the second most common type, affecting five or more joints in the first 6 months. Tests for rheumatoid factor are …

Learn about rheumatoid arthritis, including how it is diagnosed and treated, and tips for living with the condition.

Other Tests To rule out conditions that have similar symptoms, doctors may order other types of blood tests, such as: Antibody tests for rheumatoid factor (RF) and anticyclic citrullinated …

Rheumatoid factor (RF) and anti-cyclic citrullinated peptide (CCP) antibodies. These autoantibodies are rarely detected in children with JIA. When present, they usually correspond …

Rheumatoid factor (RF): This blood test checks for RF, an antibody most people with rheumatoid arthritis eventually have in their blood. (An antibody is a special protein made by the immune …

Esto puede provocar más daño y discapacidad. A veces, los síntomas de la artritis reumatoide empeoran en "brotes" debido a algún factor desencadenante como: estrés, demasiada …

Arthritis is joint inflammation that can cause stiffness or pain. Learn more about the symptoms & treatments.

Lupus is a disease where the body's defense system attacks healthy cells and tissues, causing damage to many parts of the body. Learn more about this disease.