Megaprosthetic replacement of the pelvis - Function in 17 cases

Between 1980 and 1997, we treated 39 patients (mean age 39 (16-66) years, 2 4 men) with megaprosthetic replacement of a large bone defect (> 10 cm) of the pelvis. The bone resection was necessary in 38 cases due to malignant b one and soft tissue tumors and in 1 case due to hydatid disease. Polyacetal hemipelvic replacement was performed in 29 cases, CAD hemipelvic replaceme nt in 8 cases, and a saddle prosthesis was inserted in a cases. All patients were followed clinically and radiographically The mean follow- up was 58 (15-110) months. 20 patients have died of their tumor. 10 local i nfections occurred, in 2 cases necessitating hemipelvectomy. Hip dislocatio n occurred in 6 cases. 13 of the remaining 17 survivors had good or excelle nt clinical results according to the Enneking evaluation (MSTS). In 6 of th e 17 survivors, radiographs revealed implant loosening.