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Gene test shows which bladder cancer patients may have cancer spread
Date:1/20/2011

AURORA, Colo. (Jan. 20, 2011)--Cancer scientists have designed the first molecular test to predict which bladder cancer patients may have cancer involvement in their lymph nodes at the time of surgerywhich could help doctors determine which patients are good candidates for pre-surgical, or neo-adjuvant, chemotherapy.

The test analyzes 20 genes on tumor biopsies, according to a paper published online Jan. 20, 2011, in Lancet Oncology.

"Randomized clinical trials have shown that giving neo-adjuvant chemotherapy extends patient lives, but only 5 to 15 percent of patients benefit," says urologic surgeon Dan Theodorescu, MD, PhD, director of the University of Colorado Cancer Center and lead author of the study. "Patients who have cancer in the lymph nodes at time of diagnosis are likely to benefit the most."

The study analyzed patient tumor samples from the United States, Canada and Germany. It was funded by the National Cancer Institute.

"Today, only about 2 percent of people with invasive bladder cancer have pre-surgical chemotherapy because it's quite difficult to get through and there is fear of delaying surgery," Theodorescu says. "We need a better way to predict who will benefit, and that's what this test does by identifying patients with a high likelihood of lymph node involvement before surgery."

By the time a third of people are diagnosed, bladder cancer has invaded from the bladder lining into the bladder muscle. Gold-standard treatment includes surgical removal of the bladder and the surrounding lymph nodes; some people also undergo radiation treatment. Even with these treatments, the cancer will recur and spread in about half the peoplewhich is almost always fatal.

Bladder cancer is diagnosed during a procedure called a transurethral resectionessentially a biopsy of the bladder. Using the new test, pathologists can determine the levels for the 20 genes in the diagnostic tissue sample and indicate whether the patient has ca
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Contact: Caitlin Jenney
caitlin.jenney@ucdenver.edu
303-328-5720
University of Colorado Denver
Source:Eurekalert

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