Classic metaphyseal fracture of child abuse (metaphyseal corner or bucket handle fracture)

Metaphyseal corner fracture of the distal femur (arrows). This classic metaphyseal lesion occurs when the extremity is pulled or twisted, or the child is shaken. The resultant shearing force undercuts an isolated fragment of the metaphysis that includes the subperiosteal bone collar. When viewed tangentially, the lesion appears as a triangular fragment of the metaphysis (ie, the "corner" fracture).