#rheumatoid_arthritis__atrophic_arthritis__rheumatism  a chronic autoimmune disease with inflammation of the joints and marked deformities; something (possibly a virus) triggers an attack on the synovium by the immune system, which releases cytokines that stimulate an inflammatory reaction that can lead to the destruction of all components of the joint
  supertype:  arthritis  autoimmune_disease
  subtype:  psoriatic_arthritis  a form of rheumatoid arthritis usually affecting fingers and toes and associated with psoriasis
  subtype:  Still's_disease__juvenile_rheumatoid_arthritis  a form of rheumatoid arthritis that affects children; large joints become inflamed and bone growth may be retarded

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