[Fracture-avulsions of the patella in children. Apropos of 3 cases].

Three cases of sleeve fractures of the patella are reported. These lesions are epiphyseal fractures. Attention is drawn to the fact that the diagnosis may be missed. Surgical treatment is necessary to attaining and maintaining reduction. The authors focus on that avascular necrosis is important in sleeve fractures and the open reduction increases this risk.