That's a very good explanation. I would add that a 'cancer' takes 15 - 20 years to develop from one original cellular derangement to a clinically obvious tumour

That's a very good explanation. I would add that a 'cancer' takes 15 - 20 years to develop from one original cellular derangement to a clinically obvious tumour. we arrive in the last 12 months of the process and try to affect cure on this diverse, evolved cellular civilisation. No wonder we fail. Harnessing the immune system however - now that could be more promising as an approach that the cancer can't evolve away from as easily eg announced just last week: http://www.ascopost.com/ViewNews.aspx?nid=4189 http://www.ascopost.com/ViewNews.aspx?nid=4189