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Valgus extension overload (VEO) syndrome is a condition seen in throwing athletes, in which repetitive stresses of throwing lead to progressive changes within the elbow joint, which cause pain and athletic impairment. Eventual breakdown of the cartilage can lead to unstable body formation, development of bony osteophytes (spurs) and, in many cases, loss of normal elbow extension. Forces can also compromise the most important restraint on the medial side of the elbow, the ulnar collateral ligament (UCL). Injury to the UCL can precipitate or exacerbate VEO due to increased loading of the aticular surfaces.

I have never heard of it before, but what you want to bet it becomes the hot new diagnosis for a sore elbow?