The technique of segmental therapy used by the author is described. Hodgkin's disease can be treated successfully by kilovoltage roentgen therapy. A 5 year survival rate of 50 per cent and a 10 year survival rate of 30 per cent is reported. No patient in this series subsequently developed spinal cord compression from vertebral or extradural tumor. No patient free of disease for 10 years has developed recurrence in up to 33 years. All patients have been followed up to July, 1967 or to death. While it is not the subject of this report, the same technique of therapy yields similar results in the treatment of lymphosarcoma.