<prompt> Part of spine, involved in Rheumatoid arthritis is:CervicalThoracicLumbarSacral  <response>: Ans. is a cervical spine Ref. Harrison, 17e p 2086 16e, p 1971 15e, p 1932.Rheumatoid arthritis commonly involves joints of hands, wrist, knees, elbow, ankle, feet in symmetrical manner.The axial skeleton involvement is usually limited to upper cervical spine - Harrison, 15e, p. 1932. 