After 20 years of screening for breast and prostate cancer, several observations can be made. First, the incidence of these cancers increased after the introduction of screening but has never returned to prescreening levels. Second, the increase in the relative fraction of early stage cancers has increased. Third, the incidence of regional cancers has not decreased at a commensurate rate. One possible explanation is that screening may be increasing the burden of low-risk cancers without significantly reducing the burden of more aggressively growing cancers and therefore not resulting in the anticipated reduction in cancer mortality. To reduce morbidity and mortality from prostate cancer and breast cancer, new approaches for screening, early detection, and prevention for both diseases should be considered.
-Abstract from the Journal of the American Medical Association, October 21, 2009.
A New York Times article last week, reporting the JAMA article, provoked a lot of interest.
And comments from Dr. MacDougall. His comments include the following:
The truth is breast and prostate cancer are caused by the rich Western diet full of beef, chicken, cheese, milk, and oils, and contaminated with powerful environmental cancer-causing chemicals. A sizable share of that $20 billion [now spent on screening that MacDougall finds wasted at best] must be spent on advertising, education, and subsidy programs to bring about monumental changes in our eating. The American Cancer Society needs to put meaning behind their apology by enthusiastically spreading the message that a starch-based diet with fruits and vegetables is fundamental for cancer prevention and good health.