If an AAA pops anywhere other than in front of a surgeon your chance of survival is something like 5%.
Hence the screening.
PSA screening in men with no prostate symptoms still hasn't been shown to save lives - I think they are looking at a PSA/MRI combo in some study.
One problem with random PSAs is you will find lots of cancers and potentially subject men to unpleasant biopsies and treatments that have a very high risk of side effects (impotence, incontinence, bowel upset due to surgery/radiation damage, sore boobs/menopausal symptoms from hormone therapy) for a condition that may never have caused them any bother.
Being able to determine which cancers are likely to be nasty amd which will remain indolent will be of great value before we roll out prostate screening effectively.
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