55岁以上男性患癌症死亡患者,1/3系前列腺癌。放射和手术治疗常不理想,因为仅30％肿瘤局限于前列腺,其他的已成为广泛性局部病灶或远处转移。主要晚期症状为排尿困难,及因癌转移而引起的骨痛。内分泌疗法对70～80％患者可能有效。鉴于症状缓解就 Men over 55 years of age suffer from cancer deaths and 1/3 of them have prostate cancer. Radiation and surgical treatment are often unsatisfactory because only 30% of the tumors are confined to the prostate, others have become widespread localized lesions or distant metastases. The main late symptoms are difficulty urinating and bone pain caused by cancer metastasis. Endocrine therapy may be effective in 70-80% of patients. In view of the relief of symptoms