Conclusion:
The tumor ablative potential of radiosurgery is more biologically potent compared with conventional radiotherapy, and thus, more likely to provide a durable retreatment result after conventional radiotherapy has failed. Because the radiosurgery dose volume is tightly conforming to the retreatment target volume, the potential for serious radiation induced tissue complications is reduced. Compared with traditional surgical salvage after radiotherapy failure, radiosurgical treatment avoids a large operation, and thus avoids the potential wound healing problems associated with operating on tissues that have been devitalized by prior radiation therapy.