802,348 articles

Reinterpretation of proximal colon polyps called hyperplastic in 2001

A research group form the United States investigated how proximal colon polyps interpreted as hyperplastic polyps in 2001 would be interpreted by expert pathologists in 2007. They found that many polyps interpreted as hyperplastic in 2001 were considered sessile serrated lesions by gastrointestinal pathologists in 2007, but there is substantial inter-observer variation amongst GI pathologists.

Risk of death following acute coronary syndromes different for men, women

Women may have a slightly higher risk of death than men in the 30 days following an acute coronary syndrome (ACS; such as heart attack or unstable angina), but this difference appears attributable to factors such as severity and type of ACS, clinical differences and angiographic severity according to a study in the August 26 issue of JAMA.

Setting priorities for patient-safety efforts will mean hard choices

Is it more urgent for hospitals, doctors and nurses to focus resources on preventing the thousands of falls that injure hospitalized patients each year, or to home in on preventing rare but dramatic instances of wrong-side surgery? Is it best to concentrate immediately on preventing pediatric medical errors or on preventing drug interactions in the elderly?

Slow-motion earthquake testing probes how buildings collapse in quakes

It takes just seconds for tall buildings to collapse during earthquakes. Knowing what's happening in those seconds can help engineers design buildings that are less prone to sustaining that kind of damage. But the nature of collapse is not well understood. That's why researchers at the University at Buffalo and Kyoto University teamed up to try an innovative "hybrid" approach to testing that may...

Study finds women slightly more likely to die than men in the 30 days following a heart attack

A new study from NYU School of Medicine found that women may have a slightly higher risk of death than men in the thirty days following an acute coronary syndrome, but that these differences appear to be attributable to factors such as severity and type of ACS. The study, published in the August 26, 2009 issue of the Journal of the American Medical Association, found however that overall there was...

Typhoid fever cases in US linked to foreign travel

Infection with an antimicrobial-resistant strain of typhoid fever among patients in the United States is associated with international travel, especially to the Indian subcontinent (India, Pakistan, and Bangladesh), according to a study in the August 26 issue of JAMA. The study also shows an increase in certain strains of typhoid fever that are resistant to the most commonly used medications for...

UCLA scientists uncover immune system's role in bone loss

Got high cholesterol? You might want to consider a bone density test.A new UCLA study sheds light on the link between high cholesterol and osteoporosis and identifies a new way that the body's immune cells play a role in bone loss. The research could lead to new immune-based approaches for treating osteoporosis, which affects 10 million Americans.

UCSB scientists propose Antarctic location for 'missing' ice sheet

New research by scientists at UC Santa Barbara indicates a possible Antarctic location for ice that seemed to be missing at a key point in climate history 34 million years ago. The research, which has important implications for climate change, is described in a paper published today in Geophysical Research Letters, a journal of the American Geophysical Union.

University of Maryland researchers identify gene variant linked to effectiveness of plavix

Researchers at the University of Maryland School of Medicine have identified a common gene variant carried by as many as a third of the general population that is believed to play a major role in determining why people do not respond to a popular anti-clotting medication, Plavix. If the medication doesn't work, patients are at increased risk for subsequent heart attacks, strokes and other serious...

Improvement of liver stem cell engraftment by protein delivery

Researchers at INSERM (France) have engineered a chimeric protein that increases cell survival, migration and proliferation to improve stem cell engraftment. The results, which appear in the September 2009 issue of Experimental Biology and Medicine, show that TAT-Tpr-Met, a cell permeable form of the hepatocyte growth factor receptor can increase the number of hepatic stem cells integrated into...

Genomic Study Yields Plausible Cause Of Colony Collapse Disorder

Researchers have found a surprising but reliable marker of colony collapse disorder, a baffling malady that in 2007-2008 killed off more than a third of commercial honey bees in the US. Their study is the first to identify a single, objective molecular marker of the disorder, and to propose a data-driven hypothesis to explain the mysterious disappearance of American honey...

Novel Temperature Calibration Improves Microhotplate Technology

Researchers have developed a new calibration technique that will improve the reliability and stability of the microhotplate -- a novel device being developed as the foundation for miniature yet highly accurate gas sensors that can detect chemical and biological agents, industrial leaks and even signs of extraterrestrial life from aboard a planetary...

Strong Link Found Between Concussions And Brain Tissue Injury

Concussions, whether from an accident, sporting event, or combat, can lead to permanent loss of higher level mental processes. Scientists have debated for centuries whether concussions involve structural damage to brain tissue or whether physiological changes that merely impair the way brain cells function, explain this loss. Now, for the first time, researchers have linked areas of brain injury...