Active surveillance is a proactive, prospective therapy (not a treatment) to measure the pace of disease progression (or lack thereof) by regular monitoring AND instituting treatment based on pre-defined changes in the monitoring tests.
You are
not, by the way, “on AS” while you are exploring options. Quite the contrary, you certainly are a candidate for AS but you need to be further vetted and ultimately carefully selected.
There have been tweaks to the protocol over time has usage of AS has grown and a larger base of experience has been established. This has resulted in a loosening of the criteria because of the high levels of success. For example, many 3+4 favorable-risk patients are also included in AS (based, of course, on the unique individual case characteristics besides Gleason score to be the deciding factors). For those who do ultimately go on to treatment, delayed treatment for patients with small, lower-grade prostate cancers does not compromise curability…the success rates for those men are the same as those who seek immediate treatment; of course the benefits are that a significant percentage of men never need treatment, and for those that do the future treatments are superior to current technology.
The best AS programs also include dietary and lifestyle changes to influence the natural biological behavior of what’s been found. If you’ve got lousy diet and are unwilling to change, or you have no intent on ever exercising even if you’ve been told it will improve your odds of success (and longevity), then you might not be a good candidate for AS.
Look at AS as a means to effectively preserve curative options. You can look at the changes in the last 10-years as a guide to the next 10-years. First of all, look at the emergence of the less aggressive approaches. Today, if you were 76, had been on AS for 10-years (which verified slow growth PC), but a pre-defined threshold was passed and you wanted treatment, you would probably go in for a SBRT blast and be done with it for the rest of your days. 10-years ago, that wasn’t an option. HIFU is not really ready for prime-time today, but in 10-years it would be ideal (my crystal ball says) for such cases.
Secondly, if you have low-risk PC that you monitor closely on AS for 10-years until you are 76, then you can be confident that it will not suddenly and dramatically change…PC biology doesn’t work that way. After 10-years you might not do anything aggressive if you did surpass the pre-defined change limits because it would likely take years and years, decades and decades more for that already verified slow growing PC to advent itself in any initial symptoms.
Thirdly, as mentioned above, success rates for treatments improves over time.
These are the three key reasons Dr Thompson says to avoid unnecessary aggressive treatments today if you are in the low-risk category.
-Norm
Post Edited (NKinney) : 11/12/2015 10:24:45 AM (GMT-7)