1. An operation to re-establish the continuity of the bone after resection of tumours of the lower end of the femur or upper end of the tibia is described.

2. Sound bony union may be obtained, allowing walking with weight bearing after three to four months.

3. The combination of a massive tibial or femoral graft (Juvara procedure) with an intramedullary nail, a massive homogenous graft, and fixation of the patella to the autograft to accelerate its revascularisation. has given constant and rapid bony union in five cases.

4. This possibility gives real value to wide resection in the treatment of severe cases of giant-cell tumours. especially those that are recurrent. osteolytic or suspect of malignancy.

5. Its value in the treatment of sarcoma cannot be assessed in so short a series.