Panner disease

Panner disease is an osteochondrosis of the capitellum of the elbow. It causes pain and stiffness in the affected elbow and may limit extension. On radiographs, the capitulum may appear irregular with areas of radioluceny. Treatment is symptomatic, with a good prognosis. It is primarily seen in children between five and ten years old. The disease is named after the Danish radiologist Hans Jessen Panner (1871–1930).

Panner's disease is often caused by excessive throwing due to valgus stress. (AKA Little League elbow) Upon evaluation, patients will have pain with an extension overload valgus test in the posteromedial elbow.

Little leaguers' elbow in seen in new league players with unaccustomed throwing, which causes partial avulsion of the medial epicondyle.