Myself Dr Josh- A Board Certified Physician and I’m happy to help with your question today.
Well, PSA is a Prostate-specific antigen and is a protein produced exclusively by prostate cells.
The chance of having prostate cancer goes up as PSA level increases.
A reading higher than 10 may also just be benign prostate disease, but the higher the level of PSA, the more likely it is to be cancer.
As his level is 16.4 , so he may have been advised biopsy and prostate cancer diagnosis have been made
I would make clear that Neither the PSA test nor the rectal examination (DRE) is 100% accurate and can give an abnormal result even when cancer is not present.
Cancer of prostate is only diagnosed by- prostate biopsy.
You can check this link-
Hope this helped
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