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Why some prostate cancer returns
Date:5/27/2009

vered to the tumors and surrounding areas, Dr. Movsas and his colleagues at Fox Chase used custom-made oxygen probes to test 57 patients with low or immediate risk of cancer prior to radiation therapy. The probe was used prior to "radioactive seeds" which were implanted in the prostate.

Dr. Movsas' initial research found that it is possible for prostate cancer tumors to have low oxygen levels. The next step was for the team to track the long-term correlation between low oxygen levels and PSA levels following treatment.

These new findings, being presented at ASCO, ultimately reveal that a tumor's oxygen supply can significantly predict a patient's outcome following treatment, independent from tumor stage or Gleason score, a classification of the grade of prostate cancer. Of the 57 patients, the study found that eight experienced an increase in their PSA levels about eight years following treatment.

"By identifying patients at risk with low oxygen levels in prostate tumors, we're now able to build on this research and begin to explore novel treatment options for this small subset of patients. It's possible we'll find that these patients will do best with a combination of radiation therapy and other novel approaches, such as angiogenesis therapy (targeting blood vessels) or possibly even gene therapy. That's where our research is taking us next," says Dr. Movsas. "Non-invasive methods to detect oxygen levels in tumors are also very important."


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Contact: Krista Hopson
khopson1@hfhs.org
313-874-7207
Henry Ford Health System
Source:Eurekalert

Page: 1 2

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