main feature of this type of fracture is a transverse subcondylar fracture with dissociation of the metaphysis from the diaphysis. the fracture pattern of the condyles is variable and all types of fractures can occur. this is a high energy injury with a complex mechanism that includes varus and valgus forces. up to 33% of these fractures may be open, often with extensive soft tissue injuries and risk of compartment syndrome. represents 20% of all tibial plateau fractures.