<prompt> Joint not involved in Rheumatoid arthritis according to 1987 modified ARA criteria?KneeAnkleTarsometatarsalMetatarsophalangeal  <response>: 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 MetatarsophalangealWristKnee ElbowAnkle 