Osteochondral fracture of the ulno-humeral joint is an uncommon injury of the child´s elbow. This is the case of a boy of 2 years and 8 months old hasty from a second floor. As a result he suffers poly traumatism, and between injuries, he presents an osteochondral fracture of the articular surface of olecranon in connection, probably, with a posterior dislocation of the elbow reduced spontaneously. A simple excision of the fragment through an arthrotomy by medial approach was performed, and an interposition of the annular ligament in the head of the radius was verified by a lateral approach. Five years later, the child is asymptomatic and the mobility of the elbow is complete. The few cases reported in the literature are also reviewed. We emphasize on clinical assessment, monitoring and other diagnostic tests that can be needed in these patients.

Osteochondral fracture of the ulno-humeral joint is an uncommon injury of the child´s elbow. This is the case of a boy of 2 years and 8 months old hasty from a second floor. As a result he suffers poly traumatism, and between injuries, he presents an osteochondral fracture of the articular surface of olecranon in connection, probably, with a posterior dislocation of the elbow reduced spontaneously. A simple excision of the fragment through an arthrotomy by medial approach was performed, and an interposition of the annular ligament in the head of the radius was verified by a lateral approach. Five years later, the child is asymptomatic and the mobility of the elbow is complete. The few cases reported in the literature are also reviewed. We emphasize on clinical assessment, monitoring and other diagnostic tests that can be needed in these patients.