Also known as: RA Latex ; RA Latex, Turbidimetry ; RF Titer. Rheumatoid arthritis (RA), a chronic autoimmune disease that may cause stiffness, pain, loss of mobility, inflammation, and erosion (deterioration) in the joints. Multiple joints are usually affected symmetrically, the hand and wrists most commonly, but also elbows, neck, shoulders, hips, knees, and feet. Additional symptoms may include fatigue, fever, the development of nodules under the skin, especially at the elbows, and a sense of not feeling well (malaise). Patients with RA are at risk of developing anemia, systemic complications, and may have other co-existing autoimmune disorders and symptoms such as the dry eyes and mouth associated with Sj
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