As I describe in my natural diet book, The Body Friendly Zen Cookbook (and the namesake of this blog) a variety of slow cancers and illnesses such as atherosclerosis, urinary tract infections, and more, are due to cell inflammation.
Chemical treatments can reduce these inflammations, in fact here's the article on how anti inflammatory and anti oxidant chemicals appear to be beneficial for arterial plaques, reducing them and thus the associated angina and risk of heart failure.
This is also the case for many so-called slow cancers, cell inflammation first makes the cells dysplasic (i.e. adopting characteristics of cancerous cells) and finally that triggers cancerous changes in the cells. It's a very layman's description but it suffices - inflammatory disease of the cells leads to irritation, which leads to changes, usually not good changes.
In The Body Friendly Zen Cookbook I describe how natural anti inflammatory and anti oxidant compounds found in various foods can be used to halt, reduce, and even reverse the progress of cancer, plaque, and other illnesses. A lot of it has to do with interactions between these active compounds, i.e. if you're not aware of them, you may well be taking two foods which cancel out one another's beneficial effects. Similarly, there are some combinations which increase the beneficial effects of those active compounds by up to tenfold.
The book also shows you how to avoid the things which cause cell inflammation in the first place. The recipes are redacted to include the right foods in the right combinations, and better yet, the book shows you how to apply the principles to all other meals you might normally prepare, so that you really end up with very low impact on your lifestyle.
The whole diet was chosen for this minimal impact, which is certainly less than the impact of chemotherapy or surgical intervention. Due to all these reasons, the diet is one which can be followed at any time, and which will provide benefits to you at any stage of health. It's a set of good general guidelines to follow in general, and a specific diet that you can use immediately to reduce symptoms, reduce the illness, and possibly save yourself a stressful trip to surgery. And it's always good, as in the article linked to in the second paragraph, to read more and more confirmations of what I've been urging in the diet book all along.
Of course, I don't recommend that you just self-diagnose and just go for the diet for reasons of illness - I urge every one of you to consult your doctor and go for initial advice and regular checks on the progress of any illness. We have the technology to both diet AND take medical advice, and it's always best to play safe...