Prostate cancer can grow for a long time without making you feel sick, so you might not know you have it until it's too late.

This study says that even if men don’t feel sick, testing their PSA levels can help catch prostate cancer early — which supports the idea that finding it before symptoms appear is important for treatment.

This study looks at whether a blood test (PSA) can find prostate cancer before men feel sick — and it says yes, that’s why doctors use it, even if it’s not perfect. So it supports the idea that early cancer often has no symptoms and needs testing to catch it in time.