The number of sigmoidoscopy examinations that fail to attain an adequate depth of insertion increases progressively along with advancing age in men and women, according to a new study by a researcher at the San Francisco VA Medical Center (SFVAMC). In addition, the study found, women are up to twice as likely as men to have inadequate exams. The findings, which are based on reviews of thousands of records of sigmoidoscopies, suggest that a patients age and sex are important factors to consider in choosing among various colorectal cancer screening methods.
While the study does not pinpoint reasons for the climb in inadequate exams, the studys author speculates that several factors that accumulate with age may be to blame, including medical conditions that can complicate the procedure.
Flexible sigmoidoscopy, one of the most common screening tools for colorectal cancer, is a fairly simple procedure that is commonly performed in a doctors examination room. A sigmoidoscope -- a 60 centimeter-long flexible tube about the thickness of a finger -- is threaded into the patients rectum and lower third of the colon. A tiny video camera in the sigmoidoscope allows the doctor to examine the wall of the colon for polyps, cancers or other abnormalities. In practice, the sensitivity of this procedure as a screening tool depends on how much of the colon can be viewed. A reach of 50 to 60 centimeters into the colon from the anus is considered adequate. Yet, until now, the frequency with which sigmoidoscopies attain adequate reach during routine screening has been unknown. Nor has data been available to compare performance of sigmoidoscopies between men and women or people in different age groups.
Liese Greensfelder | EurekAlert!
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Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
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In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
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