Men over the age of 75 should not get PSA screening for prostate cancer. This test is controversial for men at any age, but no health organization recommends it as a screening test for men over 75 because it is very unlikely to prolong their lives.
However, a recent study of Medicare records of 61,000 Texans ages 75 and older (with no symptoms or history of prostate cancer), reported in the Journal of the American Medical Association, found that 41 percent of the men had PSA screening in 2010, including 28 percent of those 85 and older. Two-thirds of these older men were tested by primary care physicians, whose screening rates varied 10-fold.
In 2012, the U.S. Preventive Services Task Force came out against routine PSA screening for all men, and 2013 guidelines from the American Urological Association discouraged it for men 70 and older.