What abnormality is demonstrated?
Fracture involving the posterior metaphysis and the growth plate.
How are growth plate fractures classified?
Salter-Harris classification. Typically into types I to IV (although additional patterns have been described by some authors).
Which Salter Harris type fracture does this case represent? How common are they compared to other types?
Type II. This fracture type is by far the most common, accounting for ~75% of growth plate fractures.
Multiple views of the right ankle demonstrate a fracture through the posterior metaphysis, extending to the growth-plate which appears disrupted, the epiphysis shifted posteriorly. The ankle joint itself appears normally aligned.