[The effectiveness of radiation therapy in bone metastasis from breast cancer].

48 cases with bone metastasis from breast cancer were treated by radiation therapy. Result; 1) The effective ratio of radiation therapy on symptomatic relief of pain was 83%. 2) In 90% of effective cases, patients felt pain relief at 20 Gy. 3) For 3 of 7 cases which showed paralysis by vertebral metastasis, radiotherapy was very effective. 4) The patients with only bone metastasis have good prognosis. So, it is important radiotherapy is performed on different outlook.