You say you have had many PSA tests over the years?
PSA is very accurate IMO.
I had MRIs and DNA urine tests but none of them saw my cancer. Only the PSA did.

But here is what i would suggest to determine if your PSA is from a large prostate or from PCa.

Get all of your historical PSA data and plot it.. A prostate that grows over the years puts out a little more PSA over the years. So if you see the PSA line going up over the years you can feel .. maybe.. a bit better.
But if you plot it and it stays lower and then all of a sudden starts shooting up… PCa probably