Osteoarthritis, Knee

**Definition:** Noninflammatory degenerative disease of the knee joint consisting of three large categories: conditions that block normal synchronous movement, conditions that produce abnormal pathways of motion, and conditions that cause stress concentration resulting in changes to articular cartilage. (Crenshaw, Campbell's Operative Orthopaedics, 8th ed, p2019)

**Tree numbers:** - C05.550.114.606.500 - C05.799.613.500

**Synonyms:** - Osteoarthritis of Knee - Osteoarthritis of the Knee