[Muscle function of the thigh 10 years following a malignant bone tumor and implantation of a tumor prosthesis in the knee].

To objectify the muscle function of 5 patients ten years after implantation of a tumor endoprosthesis of the knee simultaneous muscle force and IEMG was recorded. The muscular activity in the operated leg was found to be reduced for the extension muscles (8-20%) and for the flexion muscles (28-52%) when comparing to the normal leg. Knee extension of the operated leg resulted from the function of the rectus femoris muscle. During normal exercise in daily life all patients were not handicapped und some of them did sport.