Drug-Development Success Rates in Oncology This chart shows the probability of a drug’s regulatory approval from the start of phase-1 for various cancer types. The overall success rate in oncology is 4.7%, the lowest rate for any area of drug development. images.investorshub.advfn.com/images/uploads/2011/2/25/krockoncology_succ_rates_BIO_1-11.png Source: http://insidebioia.files.wordpress.com/2011/02/bio-ceo-biomedtracker-bio-study-handout-final-2-15-2011.pdf