Postmenopausal women who take combination estrogen-plus-progestin hormone-replacement therapy for one year experience a twofold increase in breast density – a known risk factor for breast cancer – and a quadrupled risk of having an abnormal mammogram, according to new findings from a sub-study of the Womens Health Initiative, or WHI.
Lead investigator Anne McTiernan, M.D., Ph.D., of Fred Hutchinson Cancer Research Center, presented these findings today at the third annual International Conference on Frontiers in Cancer Prevention Research hosted by the American Association for Cancer Research. "I was surprised by the magnitude of the effect – the doubling of breast density associated with combination-hormone therapy," said McTiernan, a member of Fred Hutchinsons Public Health Sciences Division and lead physician of the WHI Clinical Coordinating Center, which is based at Fred Hutchinson.
The effect of HRT on breast density remained consistent throughout the two-year study period and was similar across ethnic and racial groups. The impact was particularly pronounced among women in the highest age bracket; those between 70 and 79 experienced a nearly threefold increase in breast density as compared to younger women, presumably because their breast tissue was less dense to begin with, McTiernan said. "These findings are unique in showing a sustained effect over two years and that even in older postmenpausal women breast density can increase in response to estrogen-plus-progestin therapy," McTiernan said.
Warren Froelich | EurekAlert!
New malaria analysis method reveals disease severity in minutes
14.08.2017 | University of British Columbia
New type of blood cells work as indicators of autoimmunity
14.08.2017 | Instituto de Medicina Molecular
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
18.08.2017 | Life Sciences
18.08.2017 | Physics and Astronomy
18.08.2017 | Materials Sciences