Retrograde femoral nailing (see text). A, Anteroposterior view of guide pin being passed 10 cm into medullary canal through intercondylar notch. B, On lateral view, medullary canal tapers distally (arrows) to form V; guide pin is placed at apex of canal. (From Herscovici D, Whiteman KW: Retrograde nailing of the femur using an intercondylar approach, Clin Orthop Relat Res 332:98, 1996.) SEE TECHNIQUE 54.30.