<prompt> Polyariticular rheumatoid ahritis is diagnosed when more than... Joints are involvedOneTwoFourFive  <response>: The initial pattern of disturbution of joint involvement may be monoaicular,oligoaicularless than 4 joints,or Polyariticular ,greater than 5 joints usually on a symmetric distribution Ref, :Robbins page no 1209 8th edition 