Immediate Curative vs Conservative Treatment in Older Men With M0, High-risk Prostate Cancer

It is currently unclear if immediate curative treatment (radiotherapy or surgery) of high-risk prostate cancer without metastasis in older men (\>=75 years) generates the same survival benefits as in younger patients or if the harms/ side-effects of immediate curative treatment outweigh the benefits. In this study the investigators randomize older patients with high-risk, non-metastatic high-risk prostate cancer to either immediate curative therapy or to conservative, more problem-oriented therapy to investigate if immediate curative treatment prolongs life, improves quality of life and is cost-effective.