Fig. 4A–B.

Our 61-year-old patient with a history of chondrosarcoma resection and radiotherapy had a trial of 5-cm femoral lengthening using an ISKD. There was complete failure of bone regeneration mainly resulting from previous local radiotherapy, the patient’s age, osteotomy at the site of previous surgery, correction of complex associated deformities, and lengthening greater than 4 cm. (A) Anteroposterior and (B) lateral plain radiographs show partial diaphyseal prosthetic replacement, which was the preferred treatment owing to the poor local biologic situation and general health of the patient.