Functioning muscle transplantation after wide excision of sarcomas in the extremity

Free functioning muscle transplantation was performed after resection of 23 sarcomas in the extremity. There were 21 soft tissue sarcomas and two mali gnant bone tumors. The tumor resection was performed with a wide margin in all except two patients who had a marginal margin in a limited area. The co nsequent extensive soft tissue defect received free musculocutaneous flaps, the motor nerve of which was repaired in the recipient site. The most freq uent procedure was latissimus dorsi transplantation to replace thigh muscle s in 17 cases. The other donors included gracilis, tensor fascia lata, and rectus femoris, which were selected according to the site of defects. Patie nts were followed up for a mean of 60 months (range, 13-119 months). The gr afted muscles showed reinnervation at a mean of 6 months postoperatively in all patients except for a 75-year-old patient, Obtained contraction of the muscles was powerful in 18 patients and fair in four patients. Performance of the salvaged limb significantly improved after recovery of the muscles. Although there were five distant recurrences, local recurrence was seen in one patient with systemic metastases. Because muscle loss could be compens ated functionally for by the innervated free muscle transfer, the method en couraged surgeons to perform more radical tumor excisions and this may have contributed to the excellent local tumor control that was achieved. Thus, functioning muscle transplantation was extremely useful in limb salvage sur gery from the functional and oncologic viewpoints.