Also a good example because there's actually been recent push back on mammography because the risks may outweigh the rewards (especially in younger age brackets). More testing does not automatically equal better outcomes. Here's one summary from the Nordic Cochrane Center (for those that don't know Cochrane is one of the gold standard organizations for evaluating the quality of biomedical research via systematic reviews https://en.wikipedia.org/wiki/Cochrane_(organisation) ):

Gøtzsche PC. Mammography screening is harmful and should be abandoned. J R Soc Med. 2015;108(9):341-345. doi:10.1177/0141076815602452 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4582264/