http://www.telegraph.co.uk/news/science/science-news/12181321/Radiotherapy-for-prostate-cancer-raises-risk-of-new-tumours.html
Citando:
The analysis suggests that the risk of developing bowel cancer within 10 years of radiotherapy rose by 68 per cent, while the odds of rectal cancer increased by 62 per cent and bladder cancer by 39 per cent. (...)
Patients should be informed that radiotherapy raises the risk of secondary cancer, say health experts.