The science section in the Guardian, along with many other newspapers, heralds a "major" breakthrough in treating melanoma using immunotherapy which stops cancer cells disguising themselves from the T cells of the immune system which would otherwise attack them. The hope is that this type of immunotherapy, where you improve the effectiveness of the immune system against cancers, could be used against many forms of cancer - lung cancer for instance.
But if there is one thing researching a chapter on the evolution of cancer has given me it is a profound respect for the ability of cancer clones to evolve themselves out of practically any nasty hole we try and create for them. I hope the inevitable hubris surrounding these recent results is not short-lived, but fear it might be. Although a good percentage of patients given these drugs show substantial short-term remission of their cancers, some 50% don't and the immunotherapy has to be discontinued in others due to toxic side-effects.
This is why I was pleased to see - in the same issue of the Guardian - a cautionary "seen it all before" piece by oncologist Ranjana Srivastava titled "Why I won’t be rushing to tell my cancer patients there’s a cure". I couldn't agree more with her.