Navigation Links
Drop in testosterone tied to prostate cancer recurrence

BOSTON, MA (October 28, 2012)Men whose testosterone drops following radiation therapy for prostate cancer are more likely to experience a change in PSA levels that signals their cancer has returned, according to new research from Fox Chase Cancer Center. The findings will be presented on October 29 at the American Society for Radiation Oncology's 54th Annual Meeting.

Specifically, men whose testosterone fell following various forms of radiation therapy were more likely to experience an increase in prostate-specific antigen (PSA)often the first indication the cancer has recurred.

"The men who had a decrease in testosterone also appear to be the men more likely to see an increase in PSA after treatment," says study author Jeffrey Martin, MD, resident physician in the Department of Radiation Oncology at Fox Chase.

In theory, doctors may one day be able to use testosterone levels to guide treatment decisions, says Martin. "For men with a decrease in testosterone, doctors might intervene earlier with other medications, or follow their PSA more closely than they would otherwise, to spot recurrences at an earlier time."

Martin and his colleagues decided to conduct the study because there is limited information regarding testosterone levels after radiation treatment and what it means for prognosis. To investigate whether a decrease in testosterone has any clinical effects, Martin and his colleagues reviewed medical records from nearly 260 men who received radiation therapy for prostate cancer between 2002 and 2008. The men were treated with either brachytherapy, in which doctors insert radioactive seeds in the prostate, or intensity modulated radiation therapy (IMRT), in which an external beam of radiation is directed at the prostate.

The researchers found that testosterone levels tended to decrease following both forms of radiation therapy. And men who experienced a post-radiation drop in testosterone particularly a significant dropwere more likely to see their PSA levels rise during the follow-up period.

Still, an increase in PSAknown as biochemical failurewas relatively rare, the authors found. "Only 4% of patients with low-risk prostate cancer had biochemical failure at five years," says Martin.

Even though researchers have seen testosterone decrease following another form of radiation, these latest findings are still somewhat surprising, says Martin, because testosterone is believed to drive prostate cancer. In fact, some patients with advanced forms are prescribed hormone therapy that attempts to knock down testosterone.

"Seeing that a drop in testosterone is tied to recurrence is kind of a surprising result," says Martin. "We don't necessarily know what this means yet. I think the relationship between testosterone levels following radiation therapy and prognosis needs more study, and until then it's premature to say this is something patients should ask their doctors about."

This was a small study that needs to be validated in a larger group of men before doctors begin basing their predictions of recurrence on patients' testosterone levels, he cautions. "I think the link between testosterone and PSA needs more study, in a larger set of patients."

Contact: Diana Quattrone
Fox Chase Cancer Center

Related medicine news :

1. Genetic markers for testosterone and estrogen level regulation identified
2. BUSM researchers identify genetic markers for testosterone, estrogen level regulation
3. Weight Loss May Increase Testosterone Levels
4. Long-term testosterone treatment for men results in reduced weight and waist size
5. Declining testosterone levels in men not part of normal aging, study finds
6. Proposed testosterone testing of some female olympians challenged by Stanford scientists
7. Can Testosterone Therapy Help Obese Men Lose Weight?
8. Moffitt Researchers find genetic predictors of fatigue for some prostate cancer patients
9. First web-based prostate cancer database launches
10. Lab Contamination Behind Debunked Link Between Virus, Prostate Cancer
11. Researchers reveal underlying mechanism of powerful chemotherapy for prostate cancer treatment
Post Your Comments:
(Date:10/13/2017)... ... October 13, 2017 , ... Many families have long-term insurance that covers ... companies have a waiver for care if the client has a cognitive impairment diagnosis. ... pays for care, is often waived, so the benefits from their insurance start immediately,” ...
(Date:10/13/2017)... Abilene, Texas (PRWEB) , ... October 13, 2017 , ... ... publication this week that explains one of the most popular and least understood books ... seems like cryptic and puzzling descriptions that have baffled scholars for centuries. Many have ...
(Date:10/13/2017)... (PRWEB) , ... October 13, 2017 , ... “America On ... Christian identity. “America On The Brink” is the creation of published author, William ... several great-grandchildren. As a WWII veteran, he spent thirty years in the Navy. ...
(Date:10/12/2017)... ... 12, 2017 , ... The company has developed a suite ... regulatory authorities worldwide. From Children’s to Adults 50+, every formula has been developed ... , These products are also: Gluten Free, Non-GMO, Vegan, Soy Free, Non-Dairy*, ...
(Date:10/12/2017)... (PRWEB) , ... October 12, 2017 , ... ... drug delivery system that we intend to develop to enable prevention of a ... lead to severe hearing loss, especially in pediatric patients. For cisplatin, hearing loss ...
Breaking Medicine News(10 mins):
(Date:9/27/2017)... , Sept. 27, 2017  Commended for their devotion to ... awards. Ranked as number one in the South Florida Business ... in Inc. 5000 yearly list, the national specialty pharmacy has ... Armando Bardisa will soon be honored by SFBJ as ... Set to receive his award in October, ...
(Date:9/22/2017)... Sept. 22, 2017  As the latest Obamacare repeal ... Bill Cassidy (R-LA) and Lindsey Graham ... the medical device industry is in an odd place. ... the 2.3% excise tax on medical device sales passed ... want covered patients, increased visits and hospital customers with ...
(Date:9/18/2017)... R.I. , Sept. 18, 2017 /PRNewswire/ ... the fields of bioinformatics and immune engineering, ... a protective avian influenza A (H7N9) vaccine. ... distantly related to seasonal influenza and presents ... rely on prior exposure to be effective. ...
Breaking Medicine Technology: