One stage femoral lengthening of approximately 3 cm. Simultaneous correction of rotation up to 20° or axial correction in the frontal or sagittal plane by 5°. Congenital or posttraumatic femoral shortening between 2.5 and 4 cm. Shortening of less than 2 cm, to be treated by shoe lifts. Shortening of more than 4 cm, to be treated by continuous distraction. Ipsilateral osteoarthritis of hip. Moderate or severe osteoporosis. Status after local infection. Unreliable patient. Detachment of vastus lateralis, provisional insertion of 95° condylar plate, marking of the proximal and distal transverse osteotomies, proximally of the lateral half and distally of the medial half. Removal of plate and osteotomy. This subtrochanteric step cut must correspond to the preoperative drawing. Distraction of the osteotomy and definite internal fixation. The defects are filled with autogenous or allogeneic corticocancellous bone blocks. Report of 18 patients. Removal of implant material after an average of 23 months (16 to 28 months). Follow-up of all patients between 6 and 48 months after implant removal. With the exception of 1 avulsion of a too short condylar plate and 1 gradual subtrochanteric valgus deformity after too early implant removal no complications were recorded. The obtained corrections as well as the functional results were satisfying in all patients.