The ‘natural history’ of an illness means what happens if there is no treatment. It is important’ to have some idea of how your cancer might behave without any treatment before you decide what, if any, treatment to have. Of course, cancer behaves in exactly the same way if it is not sensitive to the treatment chosen. Unless you are cured, your cancer will behave like this sooner or later.

As we have learnt, a cancer starts with one or a few cells. These have to double (each one split into two) about thirty times for the cancer to reach the size of a 1cm cube. It is unusual to detect a cancer smaller than this. This means that by the time a cancer is diagnosed, even when it is very tiny, it has actually been there for quite a while. It would be at least a few weeks even in the case of very rapidly-growing cancers and many months or even years for some of the slower-growing types.

*48/40/1*