Research that tracked the diets, health and lifestyle habits of nearly 30,000 adults across the country for as long as 31 years has found that cholesterol in eggs, when consumed in large quantities, is associated with ill health effects, according to Katherine Tucker, a biomedical and nutritional sciences professor in UMass Lowell's Zuckerberg College of Health Sciences, who co-authored the analysis. The study was published in the Journal of the American Medical Association.

Cannabis use among older adults is growing faster than any other age group but many report barriers to getting medical marijuana, a lack of communication with their doctors and a lingering stigma attached to the drug, according to researchers. The study, the first to look at how older Americans use cannabis and the outcomes they experience, was published this month in the journal Drugs & Aging.

Until now, researchers have assumed that the growth of solid tumors originates from cancer stem cells characterized by specific surface markers, which develop in a fixed, hierarchical order. Accordingly, such cancer stem cells are responsible for tumor progression and produce specific types of more differentiated cancer cells whose fates are predetermined.

People who suffer a stroke caused by bleeding in the brain - known as brain haemorrhage - can take common medicines without raising their risk of another stroke, a major clinical trial has found. Researchers say the findings are reassuring for the thousands of people who take the medicines to reduce their risk of heart attack and another common type of stroke caused by blood clots in the brain.

More than 15.3 million people in the U.S. suffer from chronic obstructive pulmonary disease (COPD), which is the third leading cause of death in this country, according to the American Lung Association. Patients often experience potentially life-threatening exacerbations, which can include days-long flare-ups of symptoms including shortness of breath that occur when the airways narrow from muscle tightness, swelling and mucus.

An important class of drug used to treat cancer patients could be used to treat brain aneurysms, according to new research published this week. Brain aneurysms are a bulge in a blood vessel caused by a weakness in the blood vessel wall. As blood passes through the weakened blood vessel, blood pressure causes a small area to bulge outwards.

In breast cancer, there are cases of women and men whose cancer returns in their bones 20-30 years after they were treated for their primary disease and thought they were cancer-free. This phenomenon always puzzled Jefferson researcher Karen Bussard, PhD. How is it possible that breast cancer cells from a primary tumor are able to reach the bones when a patient is deemed "cancer-free" after treatment?