‘Cancer’ is a term used to cover a wide variety of diseases with different causes, prognoses and treatments. In England and Wales there were 223,609 new cases of all malignancies (excluding non-malignant skin cancers) registered in 2000 (ONS, 2003a) and 139,444 deaths from all neoplasms in 2003 (ONS, 2003b).
Cancer is therefore a major cause of morbidity and mortality. The leading causes of cancer mortality in Britain are lung, prostate, colorectal and stomach cancers for men, and breast, colorectal, lung and ovarian cancers for women. For men, lung, prostate and colorectal cancers account for about half of all cancer deaths, and for women breast, lung and colorectal cancers account for 46% of all deaths (Quinn et al., 2001: 7).