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Gene Mutation's Benefit for Ovarian Cancer Patients May Not Last: Study
Date:2/19/2013

TUESDAY, Feb. 19 (HealthDay News) -- Although women diagnosed with ovarian cancer who carry a BRCA gene mutation have a short-term survival advantage, this benefit is not reflected in the long-term, according to a new study.

"Of those women diagnosed with invasive ovarian cancer in the United States and Canada, approximately 35 percent are expected to be long-term survivors and ultimately cured," Thomas Sellers, director of the Moffitt Cancer Center in Tampa, Fla., said in a center news release. "We sought to estimate the 10-year survival for women with ovarian cancer -- with and without the mutations -- to determine whether or not the observed short-term survival benefit for those with the mutations was associated with a better prospect for cure."

In conducting the study, the researchers examined the long-term survival of more than 1,600 women with a BRCA1 or BRCA2 gene mutation diagnosed with invasive ovarian cancer. The women were followed for up to 15 years.

In the three years after a diagnosis of invasive ovarian cancer, the researchers found a BRCA gene mutation was linked to a better prognosis. For women without a BRCA mutation, the most deaths occurred about two years after they were diagnosed. For mutation carriers, however, the most deaths occurred about 3.5 years after diagnosis. The researchers suggested this could reflect a short-term survival advantage for BRCA carriers.

A decade after diagnosis, though, that benefit seemed to have faded, and BRCA gene mutation carriers had no survival benefit, revealed the study published recently in the Journal of the National Cancer Institute.

"Our results on long-term survival differed somewhat from those in earlier studies that found a short-term survival advantage for women with BRCA mutations," said Dr. Tuya Pal, an associate member of the Moffitt cancer epidemiology program, in the news release. "However, our results for short-term survival were
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