PSA velocity is extremely important, but I think that PSA doubling time may be more helpful. An increase in PSA can be caused by a number of things. If psa is doubling at a steady rate it is indicative of prostate cancer. If psa rises rapidily or jumps around, or levels off it's probably not PC.
What most doctors fail to do in calculating psa doubling time is to include the benign portion of psa. If someone has a 40cc prostate his benign psa is 2.6
(.066 per cc of volume). If total psa is 5.6 then 3.0 is related to the PC. If it goes to 7 the doubling time should be calculated on the 3 psa level rather than the 5.6.
This is also the reason that reoccurances have a higher doubling time than the original stats. There is no benign psa, only PC that is growing.
64 years old.
I had an initial PSA test in 1999 of 4.4. PSA increased every 6 months reaching 40 in 5-08. PSA free ranged from 16% to 10%. Over this time period I had a total of 13 biopsies and an endorectal MRIS all negative and have seen doctors at Long Beach, UCLA, UCSF and UCI. DX has always been BPH and continue to get biopsies every year.
In 10-08 I had a 25 core biopsy that showed 2 cores positive, gleason 6 at less than 5%. Surgery was recommended and I was in the process of interviewing surgeons when my wife's oncologist recommended I get a 2nd opinion from a prostate oncologist.
I saw Dr Sholtz, in Marina Del Rey, and he said that the path reports indicated no tumor, but indolant cancer clusters that didn't need any treatment. He was concerned that my PSA history indicated that I had a large amount of PC somewhere that had yet to be uncovered and put me through several more tests.
A color doppler targeted biopsy in 11-08 found a large tumor in the transition zone, gleason 6 and 7. Because of my high PSA Dr. suspected lymph node involvement, 30% chance, and sent me to Holland for a Combidex MRI, even though bone and CT scans were clear.
Combidex MRI showed clear lymph nodes and a 2,5 cm tumor in the anterior. I was his 1st patient to come up clear on the Combidex which has a 96% accuracy,
I've been on a no meat and dairy diet since 12-08 and PSA reduce to 30 while I awaited the Combidex MRI.
The location of the tumor in the anterior apex next to the urethea makes a good surgical margin very unlikely. Currently on Casodex and Proscar for 8 weeks to shrink my 60 mm prostate. Treatment will be seeds followed by 5 weeks of IMRT while continuing on Casodex and Proscar. So far no side affects from the Casodex.
As of April 10 and 7 weeks on Casodex and Proscar PSA has gone from 30 to 0.62 and protate from 60mm to 32mm. Very minor side affects. Doc says all this indicates tumor is not aggessive
Awaiting schedule for seed impants