Breast cancer statistics for 2003 are in, and researchers have announced that the number of breast cancer cases dropped by an impressive seven percent, with the greatest drop occurring in women between ages 50-69 diagnosed with estrogen receptor positive (ER-positive) breast cancer. The University of Texas M. D. Anderson Cancer Center researchers attribute this good news to the fact that in the same time frame, millions of women stopped taking hormone replacement therapy (HRT) over concerns that HRT led to an increased risk for breast cancer.
If the statistics hold for upcoming years, HRT will have proven a greater causative effect leading to breast cancer than originally believed.
"Incidence of breast cancer had been increasing in the 20 or so years prior to July 2002, and this increase was over and above the known role of screening mammography," stated Donald Berry, Ph.D. "HRT had been proposed as a possible factor, although the magnitude of any HRT effect was not known. Now the possibility that the effect is much greater than originally thought all along is plausible, and that is a remarkable finding."
While the researchers best guesstimate is that HRT might be the contributing factor to the drop in ER-positive breast cancer cases for 2003, they cannot be 100 percent certain at this point. We will need to wait and see what the years 2004 and 2005 tell us about any continuing declines in breast cancer cases, and learn what other, if any, contributing factors are responsible for the decline.
Previous posts we have done regarding HRT and breast cancer:
