Watchful Waiting (Observation) Versus Surgery for Prostate Cancer





 

A new landmark study suggests that some patients with early-stage prostate cancer can be safely observed rather than undergoing radical surgery.


 

 

WATCHFUL WAITING (OBSERVATION) VERSUS SURGERY FOR PROSTATE CANCER

In the United States, prostate cancer is the most common type of non-skin cancer occurring among men, and the second most common cause of cancer death in men.  (Lung cancer, an almost completely preventable form of cancer, sadly, remains the most common cause of cancer death for both men and women.)  The American Cancer Society estimates that, in 2012, more than 240,000 new cases of prostate cancer will be diagnosed, and more than 28,000 men will die from this form of cancer.

The debate surrounding the ideal management of early-stage prostate cancer has revolved around “watchful waiting” (observation) versus aggressive treatment with surgery or radiation therapy.  In many cases, prostate cancer is a slow-growing cancer, and when it arises in older men in particular, it seldom leads to death.  On the other hand, there are more aggressive variants of prostate cancer that spread rapidly, and these forms of prostate cancer can indeed lead to death.  The dilemma regarding which patients can be safely observed and which should be subjected to aggressive treatment has been difficult to resolve, however, because it can be difficult to determine, up front, which patients will benefit from treatment and which will not.

Last year, I reviewed a prospective randomized clinical research study from Sweden which revealed a significant improvement in survival among patients with prostate cancer who underwent prostate cancer surgery, when compared to patients who were managed with “watchful waiting”  (Prostate Cancer: Watchful Waiting Versus Surgery (Prostatectomy).)  Now, a similar new prospective randomized clinical research study provides additional important clinical information that may help doctors to identify selected prostate cancer patients who can be safely observed, thus avoiding radical cancer treatments that are associated with a high incidence of incontinence and impotence, as well as other potentially serious complications.  This new study appears in the current issue of the New England Journal of Medicine, the same journal that published last year’s Swedish prostate cancer clinical research study.

In this prospective randomized study, 731 men with newly diagnosed prostate cancer were randomly assigned to undergo radical prostate cancer surgery (prostatectomy) versus observation only.  This group of research volunteers, with an average age of 67 years, was then followed for approximately 10 years, and their outcomes were carefully monitored.  It is important to note that all of these men had early-stage prostate cancer, which appeared not to have spread outside of the prostate gland.

Following 10 years of monitoring, on average, 47 percent of the men who underwent prostatectomy died, while 50 percent of the men in the observation group died (this small difference in overall survival was not statistically significant.)  When the researchers looked at the risk of death caused specifically by prostate cancer, or due to complications associated with prostatectomy, 5.8 percent of the men in the prostatectomy group died directly as a result of either their prostate cancer or due to complications of surgery, while 8.4 percent of the men in the observation group died due to their prostate cancer, for a relative cancer-specific survival difference of 37 percent and an absolute difference of 2.6 percent in favor of the men who underwent surgery instead of observation.  Importantly, however, this observed difference in cancer-specific survival did not quite achieve statistical significance, suggesting that the cancer-specific survival benefit of radical prostatectomy in men with early-stage prostate cancer is, in general, either nonexistent or very small, at least over a 10-year period of time.

Importantly, when the authors of this study assessed prostate-specific antigen (PSA) levels, specifically, as a predictor of survival among the two groups of men who participated in this study, they found that prostatectomy did, in fact, significantly improve survival among men with a PSA level greater than 10 nanograms per milliliter (ng/ml), compared to observation alone.

As is often the case, pundits on either side of the prostate cancer treatment debate will find some ammunition in this study’s findings to support their respective positions.  Those experts who espouse aggressive treatment for most or all early-stage prostate cancers will note the nearly 3 percent improvement in absolute survival associated with radical prostatectomy, although, in this study, this difference in absolute survival was not considered to be statistically significant.  (However, it should be noted that the observed survival advantage associated with surgery in this study would have actually been higher, and perhaps statistically significant as well, had there not been a postsurgical death of one of the patients in the prostatectomy group.)  On the other hand, proponents of “watchful waiting” will point to the very small difference in observed death rates between these two groups of patients, and the relatively large number of adverse events associated with radical prostatectomy (21 percent).  However, in my view, this study’s findings offer a reasonable, evidence-based, “middle ground” strategy, based upon patients’ PSA levels.  Specifically, for older patients who have a PSA level below 10 ng/ml and no worrisome microscopic features that suggest an aggressive variant of prostate cancer, observation may indeed be a reasonable alternative to prostatectomy, based upon the findings of this landmark study.  (Unfortunately, this study did not assess radiation therapy, which is the other common form of treatment for early-stage prostate cancer.)

In completing my review of this important clinical study, I should also note that 1 out of 5 patients who enrolled in this prospective study did not remain within their assigned groups and, therefore, crossed over into the opposite group after they entered into this study.  However, while this factor does somewhat complicate the analysis of the data collected in this study, it probably does not affect the overall accuracy of the study’s conclusions.

I do not believe that this important but admittedly imperfect study will, by itself, completely resolve the ongoing debate regarding the optimal management of early-stage prostate cancer.  However, as one of only a very few well-performed randomized prospective clinical studies that have directly compared radical surgery with observation alone, and with reasonable long-term follow-up of patients, this is a very important clinical research study for both patients and their prostate cancer physicians alike.  Because of this study, both patients and their doctors will now be better able to make individualized, evidence-based decisions regarding the likely risks and benefits of surgery versus careful observation as an initial approach to prostate cancer management.


At this time, more than 8 percent of Americans are unemployed.  According to the Bureau of Labor Statistics, however, the unemployment rate for veterans who served on active duty between September 2001 and December 2011 is now more than 12 percent.  A new website, Veterans in Healthcare, seeks to connect veterans with potential employers.  If you are a veteran who works in the healthcare field, or if you are an employer who is looking for physicians, advanced practice professionals, nurses, corpsmen/medics, or other healthcare professionals, then please take a look at Veterans in Healthcare. As a retired veteran of the U.S. Army, I urge you to hire a veteran whenever possible.


For a groundbreaking overview of cancer risks, and evidence-based strategies to reduce your risk of developing cancer, order your copy of my bestselling book, “A Cancer Prevention Guide for the Human Race,” from AmazonBarnes & NobleBooks-A-MillionVroman’s Bookstore, and other fine bookstores!

Within one week of publication, A Cancer Prevention Guide for the Human Race was ranked #6 among all cancer-related books on the Amazon.com “Top 100 Bestseller’s List” for Kindle e-books. Within three months of publication, A Cancer Prevention Guide for the Human Race was the #1 book on the Amazon.comTop 100 New Book Releases in Cancer” list.




Disclaimer:  As always, my advice to readers is to seek the advice of your physician before making any significant changes in medications, diet, or level of physical activity


 

Dr. Wascher is an oncologic surgeon, professor of surgery, cancer researcher, oncology consultant, and a widely published author


 

I and the staff of Weekly Health Update would again like to take this opportunity to thank the more than 100,000 health-conscious people from around the world who visit this premier global health information website every month.  (More than 1.3 million pages of high-quality medical research findings were served to the worldwide audience of health-conscious people who visited Weekly Health Update in 2011!)  As always, we enjoy receiving your stimulating feedback and questions, and I will continue to try and personally answer as many of your inquiries as I possibly can.


 






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Lifestyle and Diet Modifications Reduce Erectile Dysfunction (ED)

Welcome to Weekly Health Update



New research suggests that the same lifestyle and diet choices that reduce cardiovascular disease risk also reduce the risk of erectile dysfunction (ED) in men, and improve male sexual function.



LIFESTYLE AND DIET MODIFICATIONS REDUCE ERECTILE DYSFUNCTION (ED)

As I discuss in my book, A Cancer Prevention Guide for the Human Race, evidence-based lifestyle and diet modifications can dramatically reduce your lifetime risk of developing cancer, including some of the most deadly forms of this disease.  As an “added benefit,” many of the same lifestyle and diet modifications that I discuss in my book have also been shown to reduce the risk of cardiovascular disease, as well.  Moreover, previous research studies have suggested that the risk of male sexual dysfunction, and erectile dysfunction (ED) in particular, might also be reduced by living a heart-healthy lifestyle.

The most important risk factors for sexual dysfunction in men, and ED in particular, include heart disease, peripheral vascular disease, elevated blood cholesterol, high blood pressure, diabetes, smoking, obesity, and sedentary behavior. Since the risk of these serious health problems can all be significantly reduced through lifestyle and diet modification, it is worth asking whether or not evidence-based lifestyle modifications associated with a reduced risk of cardiovascular disease and diabetes can also significantly reduce the risk of ED. A newly published research study, which appears in the current issue of the Archives of Internal Medicine, provides important new insights into this serious men’s health issue.

In a meta-analysis of 6 previously published prospective randomized clinical research studies, 740 adult male research study volunteers were evaluated. In this group of men, heart-healthy changes in diet, physical activity, and other modifiable lifestyle factors were associated with a highly significant improvement in sexual function when compared to similar-aged men who did not modify their lifestyle and diet. (Moreover, the addition of cholesterol-lowering statin drugs in men with elevated blood cholesterol levels improved sexual function even further than lifestyle and diet modifications, alone.)

Too many men continue to refuse to change their unhealthy lifestyles and dietary habits, and so they face an increased risk of cardiovascular disease, obesity, diabetes, high blood pressure, and other largely preventable diseases.  However, sexual function is such a very important quality-of-life factor for most men that it is my hope that studies such as this one will get the attention of men who are still living unhealthy lifestyles that increase their risk of ED and other preventable serious illnesses.  Also, as ED is now known to be an early warning sign of cardiovascular disease, diabetes, and other preventable lifestyle-associated diseases in men, modifying your lifestyle and diet to reduce your risk of ED will also significantly reduce your risk of these other life-threatening diseases at the same time (and cancer, as well)!


For a comprehensive guide to living an evidence-based cancer prevention lifestyle, order your copy of my new book, A Cancer Prevention Guide for the Human Race.  For the price of a cheeseburger, fries, and a shake, you can purchase this landmark new book, in both paperback and e-book formats, and begin living an evidence-based cancer prevention lifestyle today!

For a groundbreaking overview of cancer risks, and evidence-based strategies to reduce your risk of developing cancer, order your copy of my new book, A Cancer Prevention Guide for the Human Race,” from Amazon, Barnes & Noble, Books-A-Million,Vroman’s Bookstore, and other fine bookstores!

On Thanksgiving Day, 2010, A Cancer Prevention Guide for the Human Race was ranked #6 among all cancer-related books on the Amazon.com “Top 100 Bestseller’s List” for Kindle e-books! On Christmas Day, 2010, A Cancer Prevention Guide for the Human Race was the #1 book on the Amazon.comTop 100 New Book Releases in Cancer” list!


Disclaimer:  As always, my advice to readers is to seek the advice of your physician before making any significant changes in medications, diet, or level of physical activity


Dr. Wascher is an oncologic surgeon, professor of surgery, cancer researcher, oncology consultant, and a widely published author


For a different perspective on Dr. Wascher, please click on the following YouTube link:

Texas Blues Jam


I and the staff of Weekly Health Update would again like to take this opportunity to thank the more than 100,000 health-conscious people, from around the world, who visit this premier global health information website every month. (More than 1.2 million health-conscious people visited Weekly Health Update in 2010!) As always, we enjoy receiving your stimulating feedback and questions, and I will continue to try and personally answer as many of your inquiries as I possibly can.





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