<prompt> Feature of osteoahritis is -Heberden nodeIncreased ESROnycholysisZ deformity  <response>: Ans. is a i.e., Heberden node Joint involvement in OA Common joints : Knee, Hip, Spine cervical, lumbosacral, Hand PIP, DIP, first carpometacarpal, first tarsometatarsal. Uncommon joint : Shoulder Spared : Wrist, elbow, ankle, metacarpophalangeal. In osteoahritis of hand : Distal interphalangeal joint :- Heberdens node. Proximal interphalangeal joint :- Bouchards node 