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What is Ostearthritis commonly involves -a) Proximal IP jointb) Distal IP jointc) Ist carpometacarpal jointd) Wrist jointe) Distal radio - ulnar joint and explain in detail?
Joint involvement in OA

Common joints : Knee, Hip, Spine (cervical, lumbosacral), Hand (PIP, DIP, first carpometacarpal), first tarso-metatarsal.
Uncommon joint : Shoulder
Spared : Wrist, elbow, ankle, metacarpophalangeal.