Those eating one or more servings of raw broccoli a month (as opposed to less than one serving a month) reduced their chance of dying from bladder cancer by 57% and reduced the risk of dying from all causes by 45%.
Source: Tang L, Zirpoli GR, Guru K, Moysich KB, Zhang Y, Ambrosone CB, et al. Intake of Cruciferous Vegetables Modifies Bladder Cancer Survival. Cancer Epidemiol Biomarkers Prev. 2010 Jun 15.