[Surgical tactics in malignant bone tumors].

In treating bone sarcomas two principles apply: 1) Oncologically radical removal of the tumor. 2) Maximum functional preservation and/or restoration of the extremity. Modern chemotherapy has clearly improved the prognosis for some sarcomas (e.g. osteosarcoma, Ewing's sarcoma), justifying even extensive surgery and lengthy rehabilitation. Primary malignant bone tumors are fairly rare. To optimize therapeutical results, supraregional and interdisciplinary treatment centers have to be established.