Men being treated for prostate cancer using hormone therapy maybe under-recognized for their risk of developing osteoporosis, according to a new study. Researchers writing in the January 15, 2005 issue of CANCER, a peer-reviewed journal of the American Cancer Society, say few patients get tested for osteoporosis during treatment. Moreover, even men with other risk factors for osteoporosis, such as smoking or receiving the hormone treatment for a long time, are still unlikely to receive prevention or treatment.
Osteoporosis is a disease characterized by brittle, easily fractured bones that is associated with significant morbidity, mortality, and healthcare cost. It is caused by dysregulation of the hormone-regulated bone remodeling system that leads to a loss of bone mineral density. Risk factors for male osteoporosis include age-associated hormone changes, alcoholism, smoking, some medications, including those used in the treatment of prostate cancer.
Osteoporosis can be prevented and even treated using a wide range of therapies. Common prevention measures include calcium and vitamin D supplements, regular exercise. Screening test such as the dual-energy X-ray absorptiometry (DXA) scan is also available. But, even now, there is no established national consensus guiding doctors of when and what to prescribe. Treatment strategies include bisphosphonates, which have been shown to prevent further bone loss, but it is inconvenient, sometimes expensive, and may cause serious side effects. To find out how clinicians were managing osteoporosis risk in the U.S. in year 2003 and identify factors that might predict who gets treated, Tawee Tanvetyanon, M.D. from Loyola University Chicago Stritch School of Medicine reviewed the sampled records of 184 prostate cancer patients who received androgen deprivation therapy (ADT), which is known to raise the risk of osteoporosis.
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The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
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Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
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The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
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