Background The triplane fracture, a unique transitional physeal injury, is classically described in the distal tibia. A small number of additional anatomic locations are documented in the orthopaedic literature. Methods Available literature surrounding triplane fractures was reviewed. We describe a rare case of a proximal tibial triplane fracture in a thirteen-year-old girl, suffered during a skiing accident. Results Using arthroscopically assisted percutaneous reduction techniques an anatomic reduction was achieved. Conclusion We outline the surgical and postoperative techniques for management of this unique injury.