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What is Joint not involved in Rheumatoid arthritis according to 1987 modified ARA criteria? and explain in detail?
According to 1987 modified ARA criteria : -

Arthritis of 3 or more joint areas: soft tissue swelling (arthritis) of 3 or more joint areas observed simultaneously by a physician. The 14 possible joint areas involved are, right or left:


Proximal interphalangeal   
Metacarpophalangeal     
Metatarsophalangeal
Wrist
Knee 
Elbow
Ankle