My understanding is that the PAP test is an old (pre-PSA) test that few
use today. Apparently, if your PAP was elevated, you usually had
advanced (i.e. incurable) PCa, and if it was not elevated, you may or
may not have PCa. Certainly, a less than perfect test.

So, it makes sense to go with the PSA, a better yea or nea on PCa in
general. However, in Strum's book, he suggests that the PAP has good
predictive value for treatment success. This seems to make sense. If
the PAP is low, most likely the cancer is still in the prostate bed.

The doctors I have talked to do not seem interested in the PAP
information. I'm wondering if they feel it can only reduce their
patient base and cut into their profits. I feel they know that bone
scans and CT scans are almost always negative, so for the CYA factor,
they order them. But, if the PAP test were a better predictor, it would
certainly be much easier and cheaper.

John