There are as many different cancers as there are different cells in our bodies ...... each may have it's own treatment!
Talk of a panacea for cancer is very premature if indeed it is possible at all.
Some of the treatments are very effective whilst others are not, and the same cancer may have a whole list of different treatments available.

My own wife is suffering from secondary endrometrial cancer so my interest is slightly more than academic! Her treatment is Megace which (according to Christies Hospital) is eather very effective or almost useless, dependant on the patient. When she started her treatment (daily tablet) we were told of an effective treatment life for this drug was four years ...... that was four years ago now!
Having said that the secondaries are not getting any bigger and they keep revising the effective lifetime (of the treatment) every time, probably because they did not prescribe Megace more than four years ago.


Still .... it could be worse!