Patients with autoimmune diseases with arthritis are evaluated for diagnosis and management in the Inflammatory Arthritis Clinic. Diagnostic and therapeutic joint aspiration and injection procedures, with and without ultrasound assistance, are performed in the clinic. Many patients also participate in research into the cause and treatments of these diseases. Diseases include rheumatoid arthritis, reactive arthritis, ankylosing spondylitis, undifferentiated spondyloarthritis, psoriatic arthritis, arthritis associated with inflammatory bowel disease, Still's disease and auto inflammatory diseases.