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Rotationplasty after failure of a knee prosthesis for a malignant tumour of the distal femur

Saint-Vincent de Paul Hospital, 74–82 Avenue Denfert-Rochereau, 75674 Paris, Cedex 14, France.

Correspondence should be sent to Dr P. Wicart.

Failure of massive knee endoprostheses implanted for malignant tumours of the distal femur in children presents a difficult problem.

We present the results of rotationplasty undertaken under these circumstances in four boys. They had been treated initially at a mean age of 9.5 years for a stage-IIB malignant tumour of the distal femur by resection and implantation of a massive knee endoprosthesis. After a mean period of eight years and a mean of four operative procedures, there was failure of the endoprosthesis because of aseptic loosening in two and infection in two. Function was poor with a mean Musculoskeletal Tumor Society score of 7.5/30, and considerable associated psychological problems.

At a mean follow-up of 4.5 years after rotationplasty there was excellent function with a mean score of 27.5/30 and resolution of the psychological problems.

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