Two years ago I wrote about the controversy of routine screening for prostate cancer.  Screening for prostate cancer is usually done with a blood test called PSA.  But whether diagnosing prostate cancer early helps patients is still unknown, and there are many serious complications that result from prostate cancer treatment.  That's why in many cases of prostate cancer watchful waiting is a reasonable choice. The U.S. Preventive Services Task Force recently reviewed the existing evidence for an...