Fifty-four patients had endoprosthetic replacement of the proximal femur af
ter resection of primary malignant or aggressive bone tumors. The mean age
of the patients was 41 years. The average duration of followup was 9 years
(range, 5-24 years). At the time of this review 35 patients are surviving.
There were six revisions of the acetabulum and seven revisions of the femor
al component, The survivorship of the prostheses without revision was 77% a
t 10 years falling to 57% at 20 years. There was a 13% risk of amputation a
nd a 1.8% incidence of infection, The mean of the functional scores of the
35 living patients was 83% (range, 60%-97%), This study showed that success
ful long term results can be obtained with cemented massive endoprostheses
despite the incidence of recognized complications including polyethylene we
ar and aseptic loosening.