One issue is that your body may have all types of tissues that might be precancerous or slow growing cancerous growths that the test will identify. To get to th

One issue is that your body may have all types of tissues that might be precancerous or slow growing cancerous growths that the test will identify. To get to them and remove them would do far more damage than leaving them alone. Even with things like prostate cancer, which is fairly easy to get to. Leaving it alone, is often the right choice depending on the age of the patient and speed of growth of the cancer.