<prompt> Feature of osteoahritis isHeberden nodeIncreased ESROnycholysisZ deformity  <response>: Joint involvement in OACommon joints: Knee, Hip, Spine cervical, lumbosacral, Hand PIP, DIP, first carpometacarpal, first tarsometatarsalUncommon joint: ShoulderSpared: Wrist, elbow, ankle, metacarpophalangealIn osteoahritis of hand:Distal interphalangeal joint:- Heberdens nodeProximal interphalangeal joint: bouchards nodeRefer: Mohindras Fundamentals of Ohopedics, 2nd edition, pg no. 88, 101, 127 