Figure 1.

Letenneur classification of Hoffa fracture. The dotted lines represent fracture lines. In Type II fracture, the dotted lines are horizontal to the base of the posterior condyle. For fractures located posterior to dotted line a, the popliteal tendon or gastrocnemius muscle attached to the fragment. For those located posterior to dotted line b, only a part of popliteal tendon or gastrocnemius muscle attached to the fragment. There is no soft tissue attachment to the fracture fragments located posterior to dotted line c.