I can certainly see how your father's PCa puts your own in high relief. However, odds are good that you really have an insignificant amount of indolent cancer. A good friend of mine with numbers very similar to yours (very low PSA, small cancer volume, GS6) finally decided after 3 years on AS to have HDR brachy. He used Dr. Ukimura at USC to monitor his PCa using Color Doppler Ultrasound, and used that to target his biopsies. The mpMRI/US fusion biopsies also seem to work well and may be able to detect more aggressive cancers. All AS programs include a confirmatory biopsy after a year. You may decide that for your peace of mind that you will want that to be a targeted biopsy using one of these advanced imaging techniques.
1- Heredity is a factor in incidence, but only one of many. You may be interested in playing with a nomogram to see how much or little your odds of PCa change. Here's one popular risk calculator based on the database of the Prostate Cancer Prevention Trial (PCPT):
deb.uthscsa.edu/URORiskCalc/Pages/calcs.jspThey use the formulae:
PCA = -1.7968 + 0.8488 X log(PSA) + 0.2693 X
FAMHIST + 0.9054 X DRE - 0.4483 X PRIORBIOP
Prostate Cancer Risk = 1 / [1 + exp(-PCA)]
HG = -6.2461 + 1.2927 X log(PSA) + 0.0306 X AGE + 1.0008 X DRE + 0.9604 X AA - 0.3634 X PRIORBIOP
High-Grade Risk = 1 / [1 + exp(-HG)]
where:
PSA=PSA in ng/mL
FAMHIST=1 if father, brother or son ever had prostate cancer; 0 otherwise DRE=1 if digital rectal exam positive, suspicious for prostate cancer; 0 otherwise PRIORBIOP=1 if ever a prior prostate biopsy was performed; 0 otherwise AGE=age in years AA=1 if African American; 0 otherwise
As you can see, they did
not find family history to be a significant predictor of high grade risk when those other variables were factored in. It only correlated with incidence.
Here's a popular calculator in which you can incorporate your biopsy results:
nomograms.mskcc.org/Prostate/PreTreatment.aspx2. You are talking about
a fortunately rare kind of prostate cancer. Research can only tell you group probabilities and doesn't predict for the individual case. If small cell PC is identified on a subsequent biopsy, you would deal with it then and further AS would not be an option. Worrying about
such remote probability events in advance serves no purpose, imho.
3. Your prostate size is certainly in the normal range. The variable related to size that may be more predictive is "PSA density." PSA density = PSA/ prostate volume = .15 average. So smaller prostates that pump out a lot of PSA are more suspicious for PCa. In the PCPT Risk Calculator cited above, you can click on the list at the right where it says "Prostate Volume and Number of Cores" to incorporate that effect.
4. Most of the research on the effect of testosterone - both free and total - is in the other direction. High levels are generally found to have no effect. (In fact, Dr. Liebowitz is actually treating his patients with high doses.) You can search this forum for discussions of much of the available research on this interesting topic. It seems that at least normal levels of T are necessary to keep healthy prostate cells healthy. I would be more worried if I had chronically
low levels of testosterone, which is strongly associated higher incidence and higher grade PCa.
- Allen