The risk of second malignancy in men with prostate cancer treated with or without radiation in British Columbia, 1984–2000

To describe the risk of second malignancy following a diagnosis of prostate cancer, in British Columbia (BC), Canada. To ascertain whether that risk changed with the use of radiation therapy.All invasive cases of prostate cancer diagnosed from 1984 through to 2000 were retrieved from the BC Tumor Registry. Standardized incidence ratios (SIRs) were calculated from observed and expected numbers as a percentage. Patients were divided into those who...