H.吉爾伯特•韋爾奇博士，達特茅斯醫學院的資深教授，他的研究領域主要是探索醫學界提倡盡早發現疾病所帶來的問題。他的研究著作大部分圍繞癌癥篩查，特彆是黑色素瘤、甲狀腺瘤、肺癌、乳腺癌和前列腺癌。他在《洛杉磯時報》、《華盛頓郵報》、《華爾街日報》、《美國醫學聯閤會期刊》、《新英格蘭醫學期刊》等主流媒體和頂級學術期刊上發錶多篇文章，並曾經接受多傢主流電視颱的采訪。韋爾奇博士同樣熱衷於教育，他在達特茅斯衛生政策和臨床實踐研究所教授流行病學和生物統計學課程，並在達特茅斯學院教授衛生政策和臨床研究。2004年，他作為訪問科學傢在世界衛生組織駐法國裏昂的國際癌癥研究所工作。2009年，他齣版的第一本學術著作≪我該做癌癥檢查嗎？也許不該，這就是為什麼》被評為“天賜良書”。

麗莎•M.施瓦茨博士、史蒂芬•沃洛辛博士達特茅斯醫學院的助理教授，研究領域包括如何提高與公眾、病患、醫生和政策製定者的溝通質量。

From a nationally recognized expert, an exposé of the worst excesses of our zeal for medical testing

After the criteria used to define osteoporosis were altered, seven million American women were turned into patients—literally overnight. The proliferation of fetal monitoring in the 1970s was associated with a 66 percent increase in the number of women told they needed emergency C-sections, but it did not affect how often babies needed intensive care—or the frequency of infant death. The introduction of prostate cancer screening resulted in over a million additional American men being told they have prostate cancer, and while studies disagree on the question of whether a few have been helped—there’s no disagreement that most have been treated for a disease that was never going to bother them. As a society consumed by technological advances and scientific breakthroughs, we have narrowed the definition of normal and increasingly are turning more and more people into patients. Diagnoses of a great many conditions, including high blood pressure, osteoporosis, diabetes, and even cancer, have skyrocketed over the last few decades, while the number of deaths from those diseases has been largely unaffected.

Drawing on twenty-five years of medical practice and research, Dr. H. Gilbert Welch and his colleagues, Dr. Lisa M. Schwartz and Dr. Steven Woloshin, have studied the effects of screenings and presumed preventative measures for disease and “pre-disease.” Welch argues that while many Americans believe that more diagnosis is always better, the medical, social, and economic ramifications of unnecessary diagnoses are in fact seriously detrimental. Unnecessary surgeries, medication side effects, debilitating anxiety, and the overwhelming price tag on health care are only a few of the potential harms of overdiagnosis.

Through the stories of his patients and colleagues, and drawing from popular media, Dr. Welch illustrates how overdiagnosis occurs and the pitfalls of routine tests in healthy individuals. We are introduced to patients such as Michael, who had a slight pain in his back. Despite soon feeling fine, a questionable abnormal chest X-ray led to a sophisticated scan that detected a tiny clot in his lung. Because it could not be explained, his doctors suggested that it could be a sign of cancer. Michael did not have cancer, but he now sees a psychiatrist to deal with his anxiety about cancer.

According to Dr. Welch, a complex web of factors has created the phenomenon of overdiagnosis: the popular media promotes fear of disease and perpetuates the myth that early, aggressive treatment is always best; in an attempt to avoid lawsuits, doctors have begun to leave no test undone, no abnormality—no matter how incidental—overlooked; and, inevitably, profits are being made from screenings, a wide array of medical procedures, and, of course, pharmaceuticals. Examining the social, medical, and economic ramifications of a health care system that unnecessarily diagnoses and treats patients, Welch makes a reasoned call for change that would save us from countless unneeded surgeries, debilitating anxiety, and exorbitant costs.