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It is a distal symmetrical poly-arthritis associated with early morning stiffness
Associated with the alleles HLADR3, HLADR 4 and HLAB27
Rheumatoid arthritis with splenomegaly and leukopenia is known as Felty’s syndrome
Pyoderma gangrenosum is a dermatological complication of rheumatoid arthritis
Rheumatoid arthritis with pulmonary nodules is seen in Caplan's syndrome