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Rheumatoid Arthritis (RA) of the Shoulder
Rheumatoid Arthritis (RA) of the Shoulder
Rheumatoid arthritis is a disease of the immune system. This is the system that protects you from infection. RA may cause pain and stiffness in your shoulder where the humerus (the bone of the upper arm) meets the shoulder socket. It can also affect the joint where your clavicle meets your scapula.