Radiation therapy occupies an important role in the management of malignant renal tumors. Presently, irradiation is utilized as a pre or postoperative adjunct to nephrectomy in potentially curable cases. Evidence is accumulating which indicates that there are fewer local recurrences and increased long‐term survivals in irradiated patients. The use of ionizing radiations for palliation can be effective. In general the cancers are slowly reponsive but display definite radiosensitivity, albeit delayed. Relatively high total doses of radiations are necessary to achieve tumor sterilization or even regression.
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