[Malignant fibrous histiocytoma in the area of a total endoprosthesis of the hip joint].

Up to now 8 cases of malignant fibrous histiocytoma are reported in whom the tumor had developed after total hip replacement. Direct contact between tumor and prosthesis was proved in 7 cases. We report on a female patient of 74 years of age in whom a malignant fibrous histiocytoma of the gluteal region had formed 15 years after total hip replacement. Tumor was located in the old operation scar. Not only a direct effect of the foreign material, but also the scar has to be regarded as an etiological factor in pathogenesis of malignant fibrous histiocytoma in these cases.