Category: Diagnostic tests & procedures
Virtual Colonoscopy Can Be Hazardous to Your Health
The US Preventive Services Task Force (USPSTF) recommends that everyone aged 50-75 be screened for colon cancer with any one of three options: colonoscopy every 10 years, flexible sigmoidoscopy every 5 years, or fecal occult blood testing (FOBT) every year. Conventional colonoscopy is considered the “gold standard” since it allows for direct detection and biopsy of early cancers and removal of precancerous...
Et tu, Biomarkers?
Everything you know may be wrong. Well, not really, but reading the research of John Ioannidis does make you wonder. His work, concentrated on research about research, is a popular topic here at SBM. And that’s because he’s focused on improving the way evidence is brought to bear on decision-making. His most famous papers get to the core of questioning how we...
Overdiagnosis
Dr. H. Gilbert Welch has written a new book Over-diagnosed: Making People Sick in the Pursuit of Health, with co-authors Lisa Schwartz and Steven Woloshin. It identifies a serious problem, debunks medical misconceptions and contains words of wisdom. We are healthier, but we are increasingly being told we are sick. We are labeled with diagnoses that may not mean anything to our health....
Molecular breast imaging (MBI): A promising technology oversold in a TED Talk?
Occasionally, there are topics that our readers want — nay, demand — that I cover. This next topic, it turns out, is one of them. It’s a link to a TED Talk. I’m guessing that most of our readers have either viewed (or at least heard of) TED talks. Typically, they are 20-minute talks, with few or no slides, by various experts...
Oprah’s buddy Dr. Christiane Northrup and breast thermography: The opportunistic promotion of quackery
Dr. Christiane Northrup came to fame as Oprah Winfrey's resident women's health expert. Unfortunately, she's using that fame to promote the unproven breast cancer screening modality thermography during Breast Cancer Awareness Month.
The mammography wars heat up again
PRELUDE: THE PROBLEM WITH SCREENING If there’s one aspect of science-based medicine (SBM) that makes it hard, particularly for practitioners, it’s SBM’s continual requirement that we adjust what we do based on new information from science and clinical trials. It’s not easy for patients, either. To lay people, SBM’s greatest strength, its continual improvement and evolution as new evidence becomes available, can...
Direct-to-Consumer Genetic Testing: Road Map or Tarot Cards?
A topic of growing interest (and concern) at SBM is laboratory and diagnostic test pseudoscience. Bogus tests are everywhere, and Kimball Atwood recently discussed several of them. But over the past several years, diagnostic tests have emerged that appear to be science-based and offer gene-level insights into your health. And these tests don’t even require a physician’s visit – just a swab...
Doctor’s Data Sues Quackwatch
A few weeks ago I posted an article about bogus diagnostic tests. I cited Doctor’s Data, Inc. (DDI), as “a company with a long history of dubious offerings.” I also wrote: You can’t help but have noticed that many of the links in this post are to articles on Quackwatch. That’s because the site is chock full of useful information about bogus tests,...