The American Cancer Society is now saying that screening for breast and prostate cancers has been overrated. Prostate cancer screening has been a problem for a long time. The PSA prostate screening test has not been shown to prevent prostate cancer deaths.
The Journal of the American Medical Association (JAMA) reports that even with a 40 percent increase in breast cancer diagnoses there has only been a 10 percent decline in cancers that have spread beyond the breast to the lymph nodes and elsewhere in the body.
Dr Laura Esserman, a professor of surgery and radiology at the University of California, San Francisco, and director of the Carol Frank Buck Breast Cancer Center, and Dr. Ian Thompson, professor and department chair of urology at The University of Texas Health Science Center, San Antonio, find that prostate cancer screening and breast cancer screening are not so different.
Both have a problem that runs counter to everything people have been told about cancer. They are finding cancers that do not need to be found because they would never spread and kill or even be noticed if left alone. Without screening these cancers would go undetected but with detection has led to a huge increase in cancer diagnosis. At the same time both screening tests are not making a dent in the number of cancers that are deadly. The dilemma for screening is that it is not usually clear which tumors need aggressive treatment and which ones can be left alone.
The New York Times, October 21, 2009, Health http://www.nytimes.com/2009/10/21/health/21cancer.html?_r=1&hp