Not Using 'Cancer' for Describing Low Grade Prostate Cancer

by Himabindu Venkatakrishnan on  September 9, 2014 at 8:00 PM Cancer News
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Oncologists suggest that the word "cancer" must be removed from the description of low grade prostate cancer, in order to prevent overtreatment while there is an active controversy among oncologists about when to treat prostate cancer patients. However a new study shows that these guidelines may not be appropriate for everyone, especially African American men.
 Not Using 'Cancer' for Describing Low Grade Prostate Cancer
Not Using 'Cancer' for Describing Low Grade Prostate Cancer

"We know that African American men have more aggressive prostate cancer than Caucasian men," says Kosj Yamoah M.D., Ph.D., Chief Resident, Department of Radiation Oncology at Thomas Jefferson University. "Our study shows that African American men who are diagnosed with a low-grade cancer at first - the cancers that are sometimes watched rather than treated - are more likely to develop aggressive disease sooner than Caucasian men."

Dr. Yamoah, together with Timothy Rebbeck and colleagues from the University of Pennsylvania, looked at patients whose cancers were low to intermediate grade and who underwent surgery to remove all or part of their prostate. The surgery was important because often men are given a so called "biopsy" Gleason score of cancer severity based on 12 needle biopsies of the prostate gland. This method is imprecise, however, and may not accurately capture men with truly low risk cancers.

In order to bypass this issue, Dr. Yamoah and colleagues only analyzed the records of men whose cancers were confirmed to be low-grade after surgical removal via a so called "pathologic" Gleeson scoring system. This method looks at several cross-sections of the entire tumor, rather than relying on a spot test. The researchers found that even in these confirmed low-grade cancers, African American men were more likely to have disease progression and worse outcomes than Caucasian men. There was about a 10 - 15 percent difference in 7-year disease control in this low-grade group (90 percent disease control at 7 years for Caucasian men versus 79 percent in African American men).

Dr. Yamoah and colleagues stress that these findings are based on retrospective analysis, which looks at patient records, and that a prospective analysis will be more definitive in helping determine whether African American men with a low Gleeson score should receive more aggressive treatment. In the meantime, Dr. Yamoah is investigating the molecular fingerprint that would help identify the African American men at highest risk for disease progression compared with those for whom watchful waiting could still be the best option.

Source: Eurekalert

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