http://rawstory.com/blog/2009/06/first-human-trials-of-prostate-cancer-drug-shock-doctors/

This link above is to a report on 2 people with terminal cases of prostate cancer who recovered completely after trying a new drug.  Prior to taking the medicine, both had tumors so large, they were determined to be inoperable.  With only one dose, the size of the tumor reduced enough to be operable.