33-E/1.1 Epiphysiolysis, Salter-Harris I
Definition
Epiphyseal fractures of the distal femur with complete separation of epiphysis (Salter-Harris I) are classified as 33-E/1.1.
True Salter-Harris I fractures are rare and there is often a small metaphyseal fragment.
Further characteristics
Children struck from the lateral side, common in sports and pedestrian injuries, often have lateral displacement of the distal fragment and valgus angulation.
Hyperextension mechanisms produce anterior displacement of the distal fragment and apex posterior angulation.
Further evaluation
If these fractures are seen in children below walking age child abuse should be suspected.
X-ray
Lateral x-ray of the knee of a 6-year-old boy following a fall form a bicycle, with normal vascularity of the leg
