<prompt> Osteoahritis does not involve?Hip jointDIPAnkle jointCervical region  <response>: Ankle joint REF: Harrisons 18th ed chapter 332 Commonly affected joints in osteoahritis include: Cervical and lumbosacral spine, hip, knee, and first metatarsal phalangeal joint MTP. In the hands, the distal interphalangeal joints heberdens node, most common and proximal interphalangeal joints bouchards node and the base of the thumb 1st CMC are often affected. Joints usually spared are: Wrist Elbow Ankle MCP Radiological features of OA: Narrowing of joint space earliest feature Sclerosis of subchondral bone Cystic lesions, osteophytes, loose bodies. 