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When it comes to mass shootings, President Obama and House Speaker Paul D. Ryan are in rare accord on a leading culprit. Both point fingers at mental illness. And in poll after poll, most Americans agree. But criminologists and forensic psychiatrists say there is a critical flaw in that view: It doesn’t reflect reality. While acknowledging that some of the country’s worst mass shooters were psychotic — the Colorado movie theater shooter, James Holmes, with his orange-dyed hair; the Virginia Tech shooter, Seung-Hui Cho, whom a judge ordered to get treatment — experts say the vast majority of these killers did not have any classic form of serious mental illness, such as schizophrenia or psychosis. (Rosenwald, 5/17)

Should men worry about the "Angelina Jolie breast-cancer gene?" A few years ago, Jolie had her breasts and ovaries removed after she found out she had a breast-cancer gene mutation that sharply increased her risk of cancer. Her decision encouraged many women to take a closer look at their family medical histories and, in some cases, to undergo genetic testing. Since then, researchers have increasingly found that BRCA1 and BRCA2 mutations have important implications for men. (McGinley, 5/17)

Today, an average of 79 people receive organ transplants — heart, lungs, livers, you name it — every day in the United States. Most of these patients are seriously ill, facing death, or at least suffering dire health consequences because of their malfunctioning organ. But increasingly, a new kind of transplant patient is emerging. They're undergoing some of the newest, riskiest transplant procedures in the world — and their lives don't even depend on them. Charla Nash got a new face. Thomas Manning got a new penis. Zion Harvey got new hands. (Feltman, 5/17)