Salter-Harris classification of physeal fractures

The growth plate is shown in green. The mnemonic refers to the fracture line and its relationship to the growth plate. The metaphysis is the bone above the growth plate, and the epiphysis is the bone below. Type I fractures disrupt the physis. Type II fractures involve a break from the growth plate up into the metaphysis, with the periosteum usually remaining intact. Type III fractures are intra-articular fractures through the epiphysis that extend across the physis. Type IV fractures cross the epiphysis, physis, and metaphysis. Type V fractures are compression injuries to the physis.