A case of a proximal humerus epiphysiolysis in a youth judo athlete is presented. Proximal humerus epiphysiolysis is a relatively rare injury that has been described in a classic study by Neer and Horwitz, among others. They state, "This lesion presents often enough to be of practical concern [...] and yet it is sufficiently uncommon so that few surgeons have had a broad experience with it." We believe this statement is still valid today. Although the proximal humerus epiphysiolysis does happen in a general youth population, some authors state that competitive sports predispose athletes to this type of injury. In our hospital, proximal humerus epiphysiolysis has been anecdotally connected to judo. For this reason, we aim to present a case of a displaced proximal humerus epiphysis injury in an adolescent judo athlete, successfully managed conservatively. With the modem video-refereeing system employed at judo toumaments, we were able to acquire the injury mechanism on video. We aim to analyse the injury mechanics and explain the forces leading to the presented injury. A discussion with a judo expert has been made about behaviour of tori and uke that ultimately led to the injury. Recommendations for injury prevention are suggested.
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