The Lancet : One in four men with suspected prostate cancer
The study estimates that adding the extra test could help one in four (27%) men avoid an unnecessary biopsy and reduce the number of men who are over-diagnosed - diagnosed with a cancer that does not go on to cause any harm during their lifetime - by 5%.

Typically, men undergo a biopsy of their prostate if they experience symptoms of prostate cancer or have a prostate specific antigen (PSA) test showing high levels of the PSA protein in their blood. Each year, over 100,000 prostate biopsies are carried out in the UK and one million are conducted in Europe. However, the PSA test is not always accurate, which means that many men undergo unnecessary biopsies....

https://medicalxpress.com/news/2017-01-men-prostate-cancer-unnecessary-biopsy.html#jCp
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