Elbow dislocations in children are rare. They may be associated with other fractures of this region, with the most common being medial epicondyle avulsion. In 15-18% of cases, the fragment is incarcerated within the joint. Less common is the association with paralysis of the ulnar nerve, which may result from the injury itself, as well as from manipulation, such as in closed reduction, or during surgical treatment. Treatment of medial epicondyle fractures is controversial, with equally satisfactory results when comparing conservative treatment and surgery, even in cases of fractures with deviation. However, open reduction with internal fixation of the epicondyle fragment is clearly indicated in cases of intra-articular entrapment of the fragment, on suspicion of entrapment of the ulnar nerve or in cases of marked instability of the elbow.